458 

Pt. 430, Subpt. B, App. X 10 CFR Ch. II (1–1–12 Edition) 

1For clarity on any other terminology 

used in the test method, please refer to IEEE 

Standard 1515–2000. 

or whole numbers. Round the final initial efficacy to one decimal place. Round the final 

lumen maintenance at 1,000 hours to a whole 

number. Round the final lumen maintenance 

at 40 percent of rated life, the final rapid 

cycle stress, and the final lamp life for medium base compact fluorescent lamps to 

whole numbers. 

4. Test Measurement: Measure the initial efficacy expressed in lumens per watt; lumen 

maintenance at 1,000 hours expressed in 

lumens; lumen maintenance at 40 percent of 

rated life expressed in lumens; rapid cycle 

stress expressed in the number of lamps that 

meet or exceed the minimum number of cycles; and lamp life expressed in hours in accordance with the test requirements specified in section 4, ‘‘CFL Requirements for 

Testing’’ of DOE’s ‘‘ENERGY STAR Program 

Requirements for [Compact Fluorescent 

Lamps] CFLs,’’ Version dated August 9, 2001 

(Incorporated by reference, see §430.22). 

[71 FR 71366, Dec. 8, 2006] 

APPENDIX X TO SUBPART B OF PART

430—UNIFORM TEST METHOD FOR

MEASURING THE ENERGY CONSUMPTION OF DEHUMIDIFIERS

1. Scope: This appendix covers the test requirements used to measure the energy performance of dehumidifiers. 

2. Definitions: 

a. Product capacity for dehumidifiers means 

a measure of the ability of a dehumidifier to 

remove moisture from its surrounding atmosphere, measured in pints collected per 24 

hours of continuous operation. 

b. Energy factor for dehumidifiers means a 

measure of energy efficiency of a dehumidifier calculated by dividing the water removed from the air by the energy consumed, 

measured in liters per kilowatt hour (L/ 

kWh). 

3. Test Apparatus and General Instructions: 

The test apparatus and instructions for testing dehumidifiers shall conform to the requirements specified in section 1, ‘‘Definitions,’’ section 2, ‘‘Qualifying Products,’’ and 

section 4, ‘‘Test Criteria,’’ of the EPA’s 

‘‘ENERGY STAR Program Requirements for 

Dehumidifiers,’’ effective January 1, 2001 (Incorporated by reference, see §430.22). Record 

measurements at the resolution of the test 

instrumentation. Round off calculations to 

the same number of significant digits as the 

previous step. Round the final minimum energy factor value to two decimal places as 

follows: 

(i) A fractional number at or above the 

midpoint between two consecutive decimal 

places shall be rounded up to the higher of 

the two decimal places; or 

(ii) A fractional number below the midpoint between two consecutive decimal 

places shall be rounded down to the lower of 

the two decimal places. 

4. Test Measurement: Measure the energy 

factor for dehumidifiers, expressed in liters 

per kilowatt hour (L/kWh) and product capacity in pints per day (pints/day), in accordance with the test requirements specified in 

section 4, ‘‘Test Criteria,’’ of EPA’s ‘‘ENERGY STAR Program Requirements for Dehumidifiers,’’ effective January 1, 2001 (Incorporated by reference, see §430.22). 

[71 FR 71366, Dec. 8, 2006] 

APPENDIX Y TO SUBPART B OF PART

430—UNIFORM TEST METHOD FOR

MEASURING THE ENERGY CONSUMPTION OF BATTERY CHARGERS

The provisions of this appendix are effective on the compliance date of any energy 

conservation standard for battery chargers. 

1. SCOPE

This appendix covers the test requirements 

used to measure battery charger energy consumption for battery chargers operating at 

either DC or United States AC line voltage 

(115V at 60Hz). 

2. DEFINITIONS

The following definitions are for the purposes of explaining the terminology associated with the test method for measuring battery charger energy consumption.1

2.1. Active mode or charge mode is the state 

in which the battery charger system is connected to the main electricity supply, and 

the battery charger is delivering current, 

equalizing the cells, and performing other 

one-time or limited-time functions in order 

to bring the battery to a fully charged state. 

2.2. Active power or real power (P) means the 

average power consumed by a unit. For a two 

terminal device with current and voltage 

waveforms i(t) and v(t), which are periodic 

with period T, the real or active power P is: 

2.3. Ambient temperature is the temperature 

of the ambient air immediately surrounding 

the unit under test. 

2.4. Apparent power (S) is the product of 

root-mean-square (RMS) voltage and RMS 

current in volt-amperes (VA). 

2.5. Batch charger is a battery charger that 

charges two or more identical batteries simultaneously in a series, parallel, series-parallel, or parallel-series configuration. A 

batch charger does not have separate voltage 


ER01JN11.020</GPH>
459 

Department of Energy Pt. 430, Subpt. B, App. Y 

or current regulation, nor does it have any 

separate indicators for each battery in the 

batch. When testing a batch charger, the 

term ‘‘battery’’ is understood to mean, collectively, all the batteries in the batch that 

are charged together. A charger can be both 

a batch charger and a multi-port charger or 

multi-voltage charger. 

2.6. Battery or battery pack is an assembly 

of one or more rechargeable cells and any integral protective circuitry intended to provide electrical energy to a consumer product, and may be in one of the following 

forms: (a) Detachable battery (a battery that 

is contained in a separate enclosure from the 

consumer product and is intended to be removed or disconnected from the consumer 

product for recharging); or (b) integral battery (a battery that is contained within the 

consumer product and is not removed from 

the consumer product for charging purposes). 

The word ‘‘intended’’ in this context refers 

to the whether a battery has been designed 

in such a way as to permit its removal or 

disconnection from its associated consumer 

product. 

2.7. Battery energy is the energy, in watthours, delivered by the battery under the 

specified discharge conditions in the test 

procedure. 

2.8. Battery maintenance mode or maintenance mode is the mode of operation when 

the battery charger is connected to the main 

electricity supply and the battery is fully 

charged, but is still connected to the charger. 

2.9. Battery rest period is a period of time 

between discharge and charge or between 

charge and discharge, during which the battery is resting in an open-circuit state in 

ambient air. 

2.10. C-rate is the rate of charge or discharge, calculated by dividing the charge or 

discharge current by the rated charge capacity of the battery. 

2.11. Cradle is an electrical interface between an integral battery product and the 

rest of the battery charger designed to hold 

the product between uses. 

2.12. Equalization is a process whereby a 

battery is overcharged, beyond what would 

be considered ‘‘normal’’ charge return, so 

that cells can be balanced, electrolyte 

mixed, and plate sulfation removed. 

2.13. Instructions or manufacturer’s instructions means the documentation packaged 

with a product in printed or electronic form 

and any information about the product listed 

on a Web site maintained by the manufacturer and accessible by the general public at 

the time of the test. It also includes any information on the packaging or on the product itself. ‘‘Instructions’’ also includes any 

service manuals or data sheets that the manufacturer offers to independent service technicians, whether printed or in electronic 

form. 

2.14. Measured charge capacity of a battery 

is the product of the discharge current in 

amperes and the time in decimal hours required to reach the specified end-of-discharge voltage. 

2.15. Manual on-off switch is a switch activated by the user to control power reaching 

the battery charger. This term does not 

apply to any mechanical, optical, or electronic switches that automatically disconnect mains power from the battery charger when a battery is removed from a cradle 

or charging base, or for products with nondetachable batteries that control power to 

the product itself. 

2.16. Multi-port charger means a battery 

charger that charges two or more batteries 

(which may be identical or different) simultaneously. The batteries are not connected 

in series or in parallel but with each port 

having separate voltage and/or current regulation. If the charger has status indicators, 

each port has its own indicator(s). A charger 

can be both a batch charger and a multi-port 

charger if it is capable of charging two or 

more batches of batteries simultaneously 

and each batch has separate regulation and/ 

or indicator(s). 

2.17. Multi-voltage charger is a battery 

charger that, by design, can charge a variety 

of batteries (or batches of batteries, if also a 

batch charger) that are of different rated 

battery voltages. A multi-voltage charger 

can also be a multi-port charger if it can 

charge two or more batteries simultaneously 

with independent voltage and/or current regulation. 

2.18. Off mode is the condition, applicable 

only to units with manual on-off switches, in 

which the battery charger: 

(1) Is connected to the main electricity 

supply; 

(2) Is not connected to the battery; and 

(3) All manual on-off switches are turned 

off. 

2.19. Rated battery voltage is specified by the 

manufacturer and typically printed on the 

label of the battery itself. If there are multiple batteries that are connected in series, 

the rated battery voltage of the batteries is 

the total voltage of the series configuration—that is, the rated voltage of each battery multiplied by the number of batteries 

connected in series. Connecting multiple 

batteries in parallel does not affect the rated 

battery voltage. 

2.20. Rated charge capacity is the capacity 

claimed by a manufacturer, on a label or in 

instructions, the battery can store under 

specified test conditions, usually given in 

ampere-hours (Ah) or milliampere-hours 

(mAh) and typically printed on the label of 

the battery itself. If there are multiple batteries that are connected in parallel, the 

rated charge capacity of the batteries is the 

total charge capacity of the parallel configuration, that is, the rated charge capacity of 

460 

Pt. 430, Subpt. B, App. Y 10 CFR Ch. II (1–1–12 Edition) 

each battery multiplied by the number of 

batteries connected in parallel. Connecting 

multiple batteries in series does not affect 

the rated charge capacity. 

2.21. Rated energy capacity means the product (in watt-hours) of the rated battery voltage and the rated charge capacity. 

2.22. Standby mode or no-battery mode means 

the condition in which: 

(1) The battery charger is connected to the 

main electricity supply; 

(2) The battery is not connected to the 

charger; and 

(3) For battery chargers with manual onoff switches, all such switches are turned on. 

2.23. Total harmonic distortion (THD), expressed as a percent, is the root mean square 

(RMS) value of an AC signal after the fundamental component is removed and interharmonic components are ignored, divided by 

the RMS value of the fundamental component. 

2.24. Unit under test (UUT) in this appendix 

refers to the combination of the battery 

charger and battery being tested. 

3. STANDARD TEST CONDITIONS

3.1. General 

The values that may be measured or calculated during the conduct of this test procedure have been summarized for easy reference in Table 3.1. 

TABLE 3.1— LIST OF MEASURED OR

CALCULATED VALUES

Name of measured or calculated 

value Reference Value 

1. Duration of the charge and maintenance mode test ....................... Section 5 .2 

2. Battery Discharge Energy ........... Section 4 .6 

3. Initial time and power (W) of the 

input current of connected battery Section 5 .8 

4. Active and Maintenance Mode 

Energy Consumption ................... Section 5 .8 

5. Maintenance Mode Power .......... Section 5 .9 

6. 24 Hour Energy Consumption .... Section 5 .10 

7. Standby Mode Power .................. Section 5 .11 

8. Off Mode Power .......................... Section 5 .12 

3.2. Verifying Accuracy and Precision of 

Measuring Equipment 

a. Measurements of active power of 0.5 W 

or greater shall be made with an uncertainty 

of ≤ 2 percent at the 95 percent confidence 

level. Measurements of active power of less 

than 0.5 W shall be made with an uncertainty 

of ≤ 0.01 W at the 95 percent confidence level. 

The power measurement instrument shall, as 

applicable, have a resolution of: 

(1) 0.01 W or better for measurements up to 

10 W; 

(2) 0.1 W or better for measurements of 10 

to 100 W; or 

(3) 1 W or better for measurements over 100 

W. 

b. Measurements of energy (Wh) shall be 

made with an uncertainty of ≤ 2 percent at 

the 95 percent confidence level. Measurements of voltage and current shall be made 

with an uncertainty of ≤ 1 percent at the 95 

percent confidence level. Measurements of 

temperature shall be made with an uncertainty of ≤ 2 °C at the 95 percent confidence 

level. 

c. All equipment used to conduct the tests 

must be selected and calibrated to ensure 

that measurements will meet the above uncertainty requirements. For suggestions on 

measuring low power levels, see IEC 62301, 

(Reference for guidance only, see §430.4) especially Section 5.3.2 and Annexes B and D. 

3.3. Setting Up the Test Room 

All tests, battery conditioning, and battery rest periods shall be carried out in a 

room with an air speed immediately surrounding the UUT of ≤ 0.5 m/s. The ambient 

temperature shall be maintained at 20 °C ± 5 

°C throughout the test. There shall be no intentional cooling of the UUT such as by use 

of separately powered fans, air conditioners, 

or heat sinks. The UUT shall be conditioned, 

rested, and tested on a thermally non-conductive surface. When not undergoing active 

testing, batteries shall be stored at 20 °C ± 5 

°C. 

3.4. Verifying the UUT’s Input Voltage and 

Input Frequency 

a. If the UUT is intended for operation on 

AC line-voltage input in the United States, 

it shall be tested at 115 V at 60 Hz. If the 

UUT is intended for operation on AC linevoltage input but cannot be operated at 115 

V at 60 Hz, it shall not be tested. 

b. If a charger is powered by a low-voltage 

DC or AC input, and the manufacturer packages the charger with a wall adapter, sells, 

or recommends an optional wall adapter capable of providing that low voltage input, 

then the charger shall be tested using that 

wall adapter and the input reference source 

shall be 115 V at 60 Hz. If the wall adapter 

cannot be operated with AC input voltage at 

115 V at 60 Hz, the charger shall not be tested. 

c. If the UUT is designed for operation only 

on DC input voltage and the provisions of 

paragraph 3.4 (b) above do not apply, it shall 

be tested with one of the following input 

voltages: 5.0 V DC for products drawing 

power from a computer USB port or the midpoint of the rated input voltage range for all 

other products. The input voltage shall be 

within ± 1 percent of the above specified voltage. 

d. If the input voltage is AC, the input frequency shall be within ± 1 percent of the 

specified frequency. The THD of the input 

voltage shall be ≤ 2 percent, up to and including the 13th harmonic. The crest factor of 

461 

Department of Energy Pt. 430, Subpt. B, App. Y 

the input voltage shall be between 1.34 and 

1.49. 

e. If the input voltage is DC, the AC ripple 

voltage (RMS) shall be: 

(1) ≤ 0.2 V for DC voltages up to 10 V; or 

(2) ≤ 2 percent of the DC voltage for DC 

voltages over 10 V. 

UNIT UNDER TEST SETUP REQUIREMENTS

4.1. General Setup 

a. The battery charger system shall be prepared and set up in accordance with the 

manufacturer’s instructions, except where 

those instructions conflict with the requirements of this test procedure. If no instructions are given, then factory or ‘‘default’’ 

settings shall be used, or where there are no 

indications of such settings, the UUT shall 

be tested in the condition as it would be supplied to an end user. 

b. If the battery charger has user controls 

to select from two or more charge rates 

(such as regular or fast charge) or different 

charge currents, the test shall be conducted 

at the fastest charge rate that is recommended by the manufacturer for everyday 

use, or, failing any explicit recommendation, 

the factory-default charge rate. If the charger has user controls for selecting special 

charge cycles that are recommended only for 

occasional use to preserve battery health, 

such as equalization charge, removing memory, or battery conditioning, these modes are 

not required to be tested. The settings of the 

controls shall be listed in the report for each 

test. 

4.2. Selection and Treatment of the Battery 

Charger 

The UUT, including the battery charger 

and its associated battery, shall be new products of the type and condition that would be 

sold to a customer. If the battery is lead-acid 

chemistry and the battery is to be stored for 

more than 24 hours between its initial acquisition and testing, the battery shall be 

charged before such storage. 

4.3. Selection of Batteries To Use for Testing 

a. For chargers with integral batteries, the 

battery packaged with the charger shall be 

used for testing. For chargers with detachable batteries, the battery or batteries to be 

used for testing will vary depending on 

whether there are any batteries packaged 

with the battery charger. 

(1) If batteries are packaged with the 

charger, batteries for testing shall be selected from the batteries packaged with the 

battery charger, according to the procedure 

in section 4.3.b. 

(2) If no batteries are packaged with the 

charger, but the instructions specify or recommend batteries for use with the charger, 

batteries for testing shall be selected from 

those recommended or specified in the instructions, according to the procedure in section 4.3.b. 

(3) If no batteries are packaged with the 

charger and the instructions do not specify 

or recommend batteries for use with the 

charger, batteries for testing shall be selected from any that are suitable for use 

with the charger, according to the procedure 

in section 4.3.b. 

b. From the detachable batteries specified 

above, the technician shall use Table 4.1 to 

select the batteries to be used for testing depending on the type of charger being tested. 

Each row in the table represents a mutually 

exclusive charger type. The technician shall 

find the single applicable row for the UUT, 

and test according to those requirements. 

c. A charger is considered as: 

(1) Single-capacity if all associated batteries have the same rated charge capacity 

(see definition) and, if it is a batch charger, 

all configurations of the batteries have the 

same rated charge capacity. 

(2) Multi-capacity if there are associated 

batteries or configurations of batteries that 

have different rated charge capacities. 

d. The selected battery or batteries will be 

referred to as the ‘‘test battery’’ and will be 

used through the remainder of this test procedure. 

TABLE 4.1—BATTERY SELECTION FOR TESTING

Type of charger Tests to perform 

Multi-voltage Multi-port Multicapacity 

Number 

of tests Battery selection (from all configurations of all associated batteries) 

No ................. No ............ No ............ 1 ............. Any associated battery. 

No ................. No ............ Yes .......... 2 ............. Lowest charge capacity battery. 

Highest charge capacity battery. 

No ................. Yes .......... Yes or No 2 ............. Use only one port and use the minimum number of batteries with the 

lowest rated charge capacity that the charger can charge. 

Use all ports and use the maximum number of identical batteries of the 

highest rated charge capacity the charger can accommodate. 

Yes ................ No ............ No ............ 2 ............. Lowest voltage battery. 

Highest voltage battery. 

462 

Pt. 430, Subpt. B, App. Y 10 CFR Ch. II (1–1–12 Edition) 

TABLE 4.1—BATTERY SELECTION FOR TESTING—Continued 

Type of charger Tests to perform 

Multi-voltage Multi-port Multicapacity 

Number 

of tests Battery selection (from all configurations of all associated batteries) 

Yes ................ Yes to either or both 3 ............. Of the batteries with the lowest voltage, use the one with the lowest 

charge capacity. Use only one port. 

Of the batteries with the highest voltage, use the one with the lowest 

charge capacity. Use only one port. 

Use all ports and use the battery or the configuration of batteries with 

the highest total rated energy capacity. 

4.4. Limiting Other Non-Battery-Charger 

Functions 

a. If the battery charger or product containing the battery charger does not have 

any additional functions unrelated to battery charging, this subsection may be 

skipped. 

b. Any optional functions controlled by the 

user and not associated with the battery 

charging process (e.g., the answering machine in a cordless telephone charging base) 

shall be switched off. If it is not possible to 

switch such functions off, they shall be set 

to their lowest power-consuming mode during the test. 

c. If the battery charger takes any physically separate connectors or cables not required for battery charging but associated 

with its other functionality (such as phone 

lines, serial or USB connections, Ethernet, 

cable TV lines, etc.), these connectors or cables shall be left disconnected during the 

testing. 

d. Any manual on-off switches specifically 

associated with the battery charging process 

shall be switched on for the duration of the 

charge, maintenance, and no-battery mode 

tests, and switched off for the off mode test. 

4.5. Accessing the Battery for the Test 

a. The technician may need to disassemble 

the end-use product or battery charger to 

gain access to the battery terminals for the 

Battery Discharge Energy Test in section 

5.6. If the battery terminals are not clearly 

labeled, the technician shall use a voltmeter 

to identify the positive and negative terminals. These terminals will be the ones that 

give the largest voltage difference and are 

able to deliver significant current (0.2 C or 1/ 

hr) into a load. 

b. All conductors used for contacting the 

battery must be cleaned and burnished prior 

to connecting in order to decrease voltage 

drops and achieve consistent results. 

c. Manufacturer’s instructions for disassembly shall be followed, except those instructions that: 

(1) Lead to any permanent alteration of 

the battery charger circuitry or function; 

(2) Could alter the energy consumption of 

the battery charger compared to that experienced by a user during typical use, e.g., due 

to changes in the airflow through the enclosure of the UUT; or 

(3) Conflict requirements of this test procedure. 

d. Care shall be taken by the technician 

during disassembly to follow appropriate 

safety precautions. If the functionality of 

the device or its safety features is compromised, the product shall be discarded 

after testing. 

e. Some products may include protective 

circuitry between the battery cells and the 

remainder of the device. If the manufacturer 

provides a description for accessing the connections at the output of the protective circuitry, these connections shall be used to 

discharge the battery and measure the discharge energy. The energy consumed by the 

protective circuitry during discharge shall 

not be measured or credited as battery energy. 

f. If the technician, despite diligent effort 

and use of the manufacturer’s instructions, 

encounters any of the following conditions 

noted immediately below, the Battery Discharge Energy and the Charging and Maintenance Mode Energy shall be reported as ‘‘Not 

Applicable’’: 

(1) Inability to access the battery terminals; 

(2) Access to the battery terminals destroys charger functionality; or 

(3) Inability to draw current from the test 

battery. 

4.6. Determining Charge Capacity for Batteries 

With No Rating 

If there is no rating for the battery charge 

capacity on the battery or in the instructions, then the technician shall determine a 

discharge current that meets the following 

requirements. The battery shall be fully 

charged and then discharged at this constant-current rate until it reaches the endof-discharge voltage specified in Table 5.2. 

The discharge time must be not less than 4.5 

hours nor more than 5 hours. In addition, the 

discharge test (Section 5.6) (which may not 

be starting with a fully-charged battery) 

shall reach the end-of-discharge voltage 

within 5 hours. The same discharge current 

shall be used for both the preparations step 

463 

Department of Energy Pt. 430, Subpt. B, App. Y 

(Section 5.4) and the discharge test (Section 

5.6). The test report shall include the discharge current used and the resulting discharge times for both a fully-charged battery 

and for the discharge test. 

For this section, the battery is considered 

as ‘‘fully charged’’ when either (a) it has 

been charged by the UUT until an indicator 

on the UUT shows that the charge is complete, or (b) it has been charged by a battery 

analyzer at a current not greater than the 

discharge current until the battery analyzer 

indicates that the battery is fully charged. 

When there is no capacity rating, a suitable discharge current must generally be determined by trial and error. Since the conditioning step does not require constant-current discharges, the trials themselves may 

also be counted as part of battery conditioning. 

5. TEST MEASUREMENT

The test sequence to measure the battery 

charger energy consumption is summarized 

in Table 5.1, and explained in detail below. 

Measurements shall be made under test conditions and with the equipment specified in 

Sections 3 and 4. 

TABLE 5.1—TEST SEQUENCE

Step Description Data 

taken? 

Equipment needed 

Test 

battery Charger 

Battery 

analyzer or 

constantcurrent 

load 

AC power 

meter 

Thermometer 

(for flooded 

lead-acid 

battery 

chargers only) 

1 .... Record general data on UUT; Section 5.1 ........ Yes .... X X .................. ................ ........................

2 .... Determine test duration; Section 5.2 ................. No ..... ............ .............. .................. ................ ........................

3 .... Battery conditioning; Section 5.3 ....................... No ..... X X X ................ ........................

4 .... Prepare battery for charge test; Section 5.4 ..... No ..... X X .................. ................ ........................

5 .... Battery rest period; Section 5.5 ......................... No ..... X .............. .................. ................ X 

6 .... Conduct Charge Mode and Battery Maintenance Mode Test; Section 5.6.Yes .... X X .................. X ........................

7 .... Battery Rest Period; Section 5.7 ....................... No ..... X .............. .................. ................ X 

8 .... Battery Discharge Energy Test; Section 5.8 ..... Yes .... X .............. X ................ ........................

9 .... Determining the Maintenance Mode Power; 

Section 5.9.

Yes .... X X .................. X ........................

10 .. Calculating the 24–Hour Energy Consumption; 

Section 5.10.

No ..... ............ .............. .................. ................ ........................

11 .. Standby Mode Test; Section 5.11 ..................... Yes .... ............ X .................. X ........................

12 .. Off Mode Test; Section 5.12 .............................. Yes .... ............ X .................. X ........................

5.1. Recording General Data on the UUT 

The technician shall record: 

(1) The manufacturer and model of the battery charger; 

(2) The presence and status of any additional functions unrelated to battery charging; 

(3) The manufacturer, model, and number 

of batteries in the test battery; 

(4) The rated battery voltage of the test 

battery; 

(5) The rated charge capacity of the test 

battery; and 

(6) The rated charge energy of the test battery. 

(7) The settings of the controls, if battery 

charger has user controls to select from two 

or more charge rates 

5.2. Determining the Duration of the Charge 

and Maintenance Mode Test 

a. The charging and maintenance mode 

test, described in detail in section 5.8, shall 

be 24 hours in length or longer, as determined by the items below. Proceed in order 

until a test duration is determined. 

(1) If the battery charger has an indicator 

to show that the battery is fully charged, 

that indicator shall be used as follows: If the 

indicator shows that the battery is charged 

after 19 hours of charging, the test shall be 

terminated at 24 hours. Conversely, if the 

full-charge indication is not yet present 

after 19 hours of charging, the test shall continue until 5 hours after the indication is 

present. 

(2) If there is no indicator, but the manufacturer’s instructions indicate that charging this battery or this capacity of battery 

should be complete within 19 hours, the test 

shall be for 24 hours. If the instructions indicate that charging may take longer than 19 

hours, the test shall be run for the longest 

estimated charge time plus 5 hours. 

(3) If there is no indicator and no time estimate in the instructions, but the charging 

current is stated on the charger or in the instructions, calculate the test duration as the 

longer of 24 hours or: 

464 

Pt. 430, Subpt. B, App. Y 10 CFR Ch. II (1–1–12 Edition) 

b. If none of the above applies, the duration of the test shall be 24 hours. 

5.3. Battery Conditioning 

a. No conditioning is to be done on leadacid or lithium-ion batteries. The test technician shall proceed directly to battery preparation, section 5.4, when testing chargers 

for these batteries. 

b. Products with integral batteries will 

have to be disassembled per the instructions 

in section 4.5, and the battery disconnected 

from the charger for discharging. 

c. Batteries of other chemistries that have 

not been previously cycled are to be conditioned by performing two charges and two 

discharges, followed by a charge, as below. 

No data need be recorded during battery conditioning. 

(1) The test battery shall be fully charged 

for the duration specified in section 5.2 or 

longer using the UUT. 

(2) The test battery shall then be fully discharged using either: 

(i) A battery analyzer at a rate not to exceed 1 C, until its average cell voltage under 

load reaches the end-of-discharge voltage 

specified in Table 5.2 for the relevant battery 

chemistry; or 

(ii) The UUT, until the UUT ceases operation due to low battery voltage. 

(3) The test battery shall again be fully 

charged as in step c.(1) of this section. 

(4) The test battery shall again be fully 

discharged as per step c.(2) of this section. 

(5) The test battery shall be again fully 

charged as in step c.(1) of this section. 

d. Batteries of chemistries other than leadacid or lithium-ion that are known to have 

been through at least two previous full 

charge/discharge cycles shall only be charged 

once per step c.(5), of this section. 

5.4. Preparing the Battery for Charge Testing 

Following any conditioning prior to beginning the battery charge test (section 5.6), the 

test battery shall be fully discharged for the 

duration specified in section 5.2 or longer 

using a battery analyzer. 

5.5. Resting the Battery 

The test battery shall be rested between 

preparation and the battery charge test. The 

rest period shall be at least one hour and not 

exceed 24 hours. For batteries with flooded 

cells, the electrolyte temperature shall be 

less than 30 °C before charging, even if the 

rest period must be extended longer than 24 

hours. 

5.6. Testing Charge Mode and Battery 

Maintenance Mode 

a. The Charge and Battery Maintenance 

Mode test measures the energy consumed 

during charge mode and some time spent in 

the maintenance mode of the UUT. Functions required for battery conditioning that 

happen only with some user-selected switch 

or other control shall not be included in this 

measurement. (The technician shall manually turn off any battery conditioning cycle 

or setting.) Regularly occurring battery conditioning or maintenance functions that are 

not controlled by the user will, by default, be 

incorporated into this measurement. 

b. During the measurement period, input 

power values to the UUT shall be recorded at 

least once every minute. 

(1) If possible, the technician shall set the 

data logging system to record the average 

power during the sample interval. The total 

energy is computed as the sum of power samples (in watts) multiplied by the sample interval (in hours). 

(2) If this setting is not possible, then the 

power analyzer shall be set to integrate or 

accumulate the input power over the measurement period and this result shall be used 

as the total energy. 

c. The technician shall follow these steps: 

(1) Ensure that the user-controllable device 

functionality not associated with battery 

charging and any battery conditioning cycle 

or setting are turned off, as instructed in 

section 4.4; 

(2) Ensure that the test battery used in 

this test has been conditioned, prepared, discharged, and rested as described in sections 

5.3 through 5.7; 

(3) Connect the data logging equipment to 

the battery charger; 

(4) Record the start time of the measurement period, and begin logging the input 

power; 

(5) Connect the test battery to the battery 

charger within 3 minutes of beginning logging. For integral battery products, connect 

the product to a cradle or wall adapter within 3 minutes of beginning logging; 

(6) After the test battery is connected, 

record the initial time and power (W) of the 

input current to the UUT. These measurements shall be taken within the first 10 minutes of active charging; 

(7) Record the input power for the duration 

of the ‘‘Charging and Maintenance Mode 

Test’’ period, as determined by section 5.2. 

The actual time that power is connected to 

the UUT shall be within ± 5 minutes of the 

specified period; and 


ER01JN11.021</GPH>
465 

Department of Energy Pt. 430, Subpt. B, App. Y 

(8) Disconnect power to the UUT, terminate data logging, and record the final time. 

5.7. Resting the Battery 

The test battery shall be rested between 

charging and discharging. The rest period 

shall be at least 1 hour and not more than 4 

hours, with an exception for flooded cells. 

For batteries with flooded cells, the electrolyte temperature shall be less than 30 °C before charging, even if the rest period must be 

extended beyond 4 hours. 

5.8. Battery Discharge Energy Test 

a. If multiple batteries were charged simultaneously, the discharge energy is the 

sum of the discharge energies of all the batteries. 

(1) For a multi-port charger, batteries that 

were charged in separate ports shall be discharged independently. 

(2) For a batch charger, batteries that were 

charged as a group may be discharged individually, as a group, or in sub-groups connected in series and/or parallel. The position 

of each battery with respect to the other 

batteries need not be maintained. 

b. During discharge, the battery voltage 

and discharge current shall be sampled and 

recorded at least once per minute. The values recorded may be average or instantaneous values. 

c. For this test, the technician shall follow 

these steps: 

(1) Ensure that the test battery has been 

charged by the UUT and rested according to 

the procedures above. 

(2) Set the battery analyzer for a constant 

discharge current of 0.2 °C and the end-of-discharge voltage in Table 5.2 for the relevant 

battery chemistry. 

(3) Connect the test battery to the analyzer and begin recording the voltage, current, and wattage, if available from the battery analyzer. When the end-of-discharge 

voltage is reached or the UUT circuitry terminates the discharge, the test battery shall 

be returned to an open-circuit condition. If 

current continues to be drawn from the test 

battery after the end-of-discharge condition 

is first reached, this additional energy is not 

to be counted in the battery discharge energy. 

d. If not available from the battery analyzer, the battery discharge energy (in watthours) is calculated by multiplying the voltage (in volts), current (in amperes), and sample period (in hours) for each sample, and 

then summing over all sample periods until 

the end-of-discharge voltage is reached. 

5.9. Determining the Maintenance Mode Power 

After the measurement period is complete, 

the technician shall determine the average 

maintenance mode power consumption by 

examining the power-versus-time data from 

the charge and maintenance test and: 

(1) If the maintenance mode power is cyclic 

or shows periodic pulses, compute the average power over a time period that spans a 

whole number of cycles and includes at least 

the last 4 hours. 

(2) Otherwise, calculate the average power 

value over the last 4 hours. 

5.10. Determining the 24-Hour Energy 

Consumption 

The accumulated energy or the average 

input power, integrated over the test period 

from the charge and maintenance mode test, 

shall be used to calculate 24-hour energy 

consumption. 

TABLE 5.2—REQUIRED BATTERY DISCHARGE

RATES AND END-OF-DISCHARGE BATTERY

VOLTAGES

Battery chemistry 

Discharge 

rate 

C 

End-ofdischarge 

voltage 

volts per cell 

Valve-Regulated Lead Acid 

(VRLA) ..................................... 0.2 1 .75 

Flooded Lead Acid ...................... 0.2 1 .70 

Nickel Cadmium (NiCd) ............... 0.2 1 .0 

Nickel Metal Hydride (NiMH) ....... 0.2 1 .0 

Lithium Ion (Li-Ion) ...................... 0.2 2 .5 

Lithium Polymer ........................... 0.2 2 .5 

Rechargeable Alkaline ................ 0.2 0 .9 

Nanophosphate Lithium Ion ........ 0.2 2 .0 

Silver Zinc .................................... 0.2 1 .2 

5.11. Standby Mode Energy Consumption 

Measurement 

The standby mode measurement depends 

on the configuration of the battery charger, 

as follows. 

a. Conduct a measurement of standby 

power consumption while the battery charger is connected to the power source. Disconnect the battery from the charger, allow 

the charger to operate for at least 30 minutes, and record the power (i.e., watts) consumed as the time series integral of the 

power consumed over a 10-minute test period, divided by the period of measurement. 

If the battery charger has manual on-off 

switches, all must be turned on for the duration of the standby mode test. 

b. Standby mode may also apply to products with integral batteries. If the product 

uses a cradle and/or adapter for power conversion and charging, then ‘‘disconnecting 

the battery from the charger’’ will require 

disconnection of the end-use product, which 

contains the batteries. The other enclosures 

of the battery charging system will remain 

connected to the main electricity supply, 

and standby mode power consumption will 

equal that of the cradle and/or adapter alone. 

466 

Pt. 430, Subpt. B, App. Z 10 CFR Ch. II (1–1–12 Edition) 

c. If the product is powered through a detachable AC power cord and contains integrated power conversion and charging circuitry, then only the cord will remain connected to mains, and standby mode power 

consumption will equal that of the AC power 

cord (i.e., zero watts). 

d. Finally, if the product contains integrated power conversion and charging circuitry but is powered through a non-detachable AC power cord or plug blades, then no 

part of the system will remain connected to 

mains, and standby mode measurement is 

not applicable. 

5.12. Off Mode Energy Consumption 

Measurement 

The off mode measurement depends on the 

configuration of the battery charger, as follows. 

a. If the battery charger has manual on-off 

switches, record a measurement of off mode 

energy consumption while the battery charger is connected to the power source. Remove 

the battery from the charger, allow the 

charger to operate for at least 30 minutes, 

and record the power (i.e., watts) consumed 

as the time series integral of the power consumed over a 10-minute test period, divided 

by the period of measurement, with all manual on-off switches turned off. If the battery 

charger does not have manual on-off switches, record that the off mode measurement is 

not applicable to this product. 

b. Off mode may also apply to products 

with integral batteries. If the product uses a 

cradle and/or adapter for power conversion 

and charging, then ‘‘disconnecting the battery from the charger’’ will require disconnection of the end-use product, which 

contains the batteries. The other enclosures 

of the battery charging system will remain 

connected to the main electricity supply, 

and off mode power consumption will equal 

that of the cradle and/or adapter alone. 

c. If the product is powered through a detachable AC power cord and contains integrated power conversion and charging circuitry, then only the cord will remain connected to mains, and off mode power consumption will equal that of the AC power 

cord (i.e., zero watts). 

d. Finally, if the product contains integrated power conversion and charging circuitry but is powered through a non-detachable AC power cord or plug blades, then no 

part of the system will remain connected to 

mains, and off mode measurement is not applicable. 

[76 FR 31776, June 1, 2011] 

APPENDIX Z TO SUBPART B OF PART

430—UNIFORM TEST METHOD FOR

MEASURING THE ENERGY CONSUMPTION OF EXTERNAL POWER SUPPLIES

1. Scope: This appendix covers the test requirements used to measure energy consumption of external power supplies. 

2. Definitions: The following definitions are 

for the purposes of understanding terminology associated with the test method for 

measuring external power supply energy consumption. For clarity on any other terminology used in the test method, please refer 

to IEC Standard 60050 or IEEE Standard 100. 

(Reference for guidance only, see §430.4.) 

a. Active mode means the mode of operation 

when the external power supply is connected 

to the main electricity supply and the output is (or ‘‘all outputs are’’ for a multiplevoltage external power supply) connected to 

a load (or ‘‘loads’’ for a multiple-voltage external power supply). 

b. Active mode efficiency is the ratio, expressed as a percentage, of the total real output power produced by a power supply to the 

real input power required to produce it. (Reference for guidance only, see IEEE Standard 

1515–2000, 4.3.1.1, §430.4.) 

c. Active power (P) (also real power) means 

the average power consumed by a unit. For a 

two terminal device with current and voltage waveforms i(t) and v(t) which are periodic with period T, the real or active power 

P is: 

d. Ambient temperature means the temperature of the ambient air immediately surrounding the unit under test. 

e. Apparent power (S) is the product of RMS 

voltage and RMS current (VA). 

f. Instantaneous power means the product of 

the instantaneous voltage and instantaneous 

current at a port (the terminal pair of a 

load). 

g. Manual on-off switch is a switch activated by the user to control power reaching 

the device. This term does not apply to any 

mechanical, optical, or electronic switches 

that automatically disconnect mains power 

from the device when a load is disconnected 

from the device, or that control power to the 

load itself. 

h. Minimum output current means the minimum current that must be drawn from an 

output bus for an external power supply to 

operate within its specifications. 

i. Multiple-voltage external power supply 

means an external power supply that is designed to convert line voltage AC input into 

more than one simultaneous lower-voltage 

output. 


ER01JN11.022</GPH>