UZB12.121
BATTERY REPLACEMENT 12V, 12AH

U-Series

BATTERY REPLACEMENT

Maintenance-free VRLA Lead-Acid Battery
AGM (Absorbent Glass Mat) Technology
Can Be Installed in Any Orientation Except Permanently
Inverted

PRODUCT DESCRIPTIONSHORT-FORM DATAThe UZB12.121 is a non-spillable maintenance-free VRLA
lead-acid battery with absorbent glass mat (AGM)
technology. It can be used as a battery replacement for
many DC-UPS battery modules.

Nominal voltage
Nominal battery
capacity
Nominal battery life
Battery current
Recommended
charging voltage

Self-discharge rate
Temperature range
Connection terminal
Size (WxHxD)
WeightORDER NUMBERS
Battery Replacement

DC 12V
12Ah
3 to 5 years
Max. 35A
Max. 3.5A
13.9V
13.75V
13.6V
13.45V
3%/month-10°C to +40°C-15°C to +50°C
Faston 250
6.35x0.8mm
151x100x98mm
4200g / 9.26lb

Capacity classAccording EUROBATDischarging current
Charging current
At 10°C
At 20°C
At 30°C
At 40°C
At 20°C
For charging
For discharging

MAIN APPROVALSUZB12.121

For details and the complete approval list, see chapter 6Jun. 2021 / Rev. 1.1 DS-UZB12.121
All parameters are typical values specified at, 25°C ambient temperature unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0Germany

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UZB12.121
BATTERY REPLACEMENT 12V, 12AH

U-Series

INDEX
Page
1.
2.
3.
4.
5.

Intended Use .......................................................3
Instructions for Disposal of the Batteries ...........3
Instructions for Battery Storage .........................3
Installation Instructions ......................................3
Environment ........................................................4Page
6.
7.
8.
9.

Approved, Fulfilled or Tested Standards ........... 4Regulatory Product Compliance ........................ 4
Physical Dimensions and Weight ....................... 5
Recommendations for a Long Battery Life ....... 6

The information given in this document is correct to the best of our knowledge and experience at the time ofpublication. If not expressly agreed otherwise, this information does not represent a warranty in the legal sense of theword. As the state of our knowledge and experience is constantly changing, the information in this data sheet issubject to revision. We therefore kindly ask you to always use the latest issue of this document (available underwww.pulspower.com).
No part of this document may be reproduced or utilized in any form without our prior permission in writing.

WARNING

Risk of electrical shock, fire, personal injury or death.

- Do not short-circuit the battery poles or power wires and always check correct battery polarity.
- Do not modify or repair the unit.

Jun. 2021 / Rev. 1.1 DS-UZB12.121
All parameters are typical values specified at, 25°C ambient temperature unless otherwise noted.
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UZB12.121
BATTERY REPLACEMENT 12V, 12AHU-Series

1. INTENDED USE
The battery is intended to be used as a battery replacement for DC-UPS systems.
Check the product datasheet of the DC-UPS or the battery module to confirm that it is suitable for the desired device.

2. INSTRUCTIONS FOR DISPOSAL OF THE BATTERIES
Always dispose batteries through a recycling organization.
Optionally, batteries can be returned to the supplier or the battery manufacturer. Batteries must be completely
discharged before recycling

3. INSTRUCTIONS FOR BATTERY STORAGE
Do not store batteries or battery modules at temperatures higher than 25°C or performance and lifetime may change.
Before initial use, check the last charging which is marked on the battery.
If it is older than 9 month, replace the battery. Do not store batteries longer than 9 months without charging or
performance and lifetime may change. Every 9 months or whenever the open circuit voltage (OCV) falls below 12.6V,
the battery module should be charged. Apply a charging voltage of 13.8V (at 25°C) for 72 hours. Batteries with an OCV
below 12V should be disposed.
Frequently charging below +5°C reduces the lifetime of the battery.

4. INSTALLATION INSTRUCTIONS
Do not short-circuit the battery poles or power wires and always check correct battery polarity.
Install the device in a cool area inside an enclosure providing protection against electrical, mechanical and fire hazards.
Do not cover or block the pressure release valves of the battery. Do not install the battery with the valve pressure
releases on the bottom side. Hydrogen gas can be released via pressure relief valves. It will form an explosive mixture
in air when the concentration exceeds 4% in volume. It is mandatory to ensure sufficient ventilation of the battery.
The necessary ventilation and air flow must be calculated according to EN 50272-2.
The device is designed for pollution degree 2 areas in controlled environments. No condensation or frost allowed.

Jun. 2021 / Rev. 1.1 DS-UZB12.121
All parameters are typical values specified at, 25°C ambient temperature unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0Germany

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UZB12.121
BATTERY REPLACEMENT 12V, 12AHU-Series

5. ENVIRONMENT
Operational temperature *)-10°C to +40°C (14°F to 104°F)

Storage temperature-15°C to +50°C (5°F to 122°F)-20°C to +50°C (-4°F to 122°F)

Humidity

5 to 95% r.h.

Vibration sinusoidal±4mm at 16.7Hz
fixed frequency for 1hour
free fall from 20cm
onto a wooden floor
0 to 6000m (0 to 20 000ft)
2ShockAltitudeDegree of pollution*)

For charging
Frequently charging below +5°C (41°F) reduced
the lifetime of the battery
For discharging
For storage and transportation
Recommendation:
Do not store at temperatures higher than 25°C
or performance and lifetime may change.
IEC 60068-2-30
Do not energize while condensation is present
Vibration in vertical mounting orientationaccording to IEC/EN 61056-1
Shock with bottom down orientationaccording to IEC/EN 61056-1
According to IEC 62477-1, not conductive

Operational temperature is the same as the ambient temperature and is defined as the air temperature 2cm below the unit.

6. APPROVED, FULFILLED OR TESTED STANDARDS
VdS

Vendor Declaration
VdS Guidelines for Alarm Systems
Maintenance-free Lead Acid Batteries

UL 1989

Vendor Certificate
Standard for Standby Batteries
UL94: HB

7. REGULATORY PRODUCT COMPLIANCE
WEEE Directive

Manufacturer's Statement
EU-Regulation on Waste Electrical and Electronic Equipment
Registered in Germany as business to business (B2B) products.

EAC TR Registration

EAC Certificate
EAC EurAsian Conformity - Registration Russia, Kazakhstan
and Belarus
8507208008, 8507202000, 8507600000, 8507800000

Jun. 2021 / Rev. 1.1 DS-UZB12.121
All parameters are typical values specified at, 25°C ambient temperature unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0Germany4/6

UZB12.121
BATTERY REPLACEMENT 12V, 12AH

U-Series

8. PHYSICAL DIMENSIONS AND WEIGHT
WidthHeightHeight
DepthWeight

151mm / 5.94’’94mm / 3.70’’
100mm / 3.94’’98mm / 3.86’’
4200g / 9.26lb

Container heightWith battery poles

Fig. 7-1 Isometric viewAll dimensions in mm

Jun. 2021 / Rev. 1.1 DS-UZB12.121
All parameters are typical values specified at, 25°C ambient temperature unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0Germany

5/6

UZB12.121
BATTERY REPLACEMENT 12V, 12AH

U-Series

9. RECOMMENDATIONS FOR A LONG BATTERY LIFE
Temperature:
The temperature has the most impact on the service life. The hotter the temperature, the earlier the wear-out phaseof the battery begins. The wear-out results in a degradation of battery capacity. Place the battery module in a coollocation, e.g. near the bottom of the control cabinet. Do not place the battery module near heat generating devices.
Do not overcharge batteries!
Fig. 8-1 Service life (according to EUROBAT) vs.
ambient temperature, typ.

Service Life in Years

10987
6543
21

Design Lifeof Battery
A: 3-5 Years
B: 6-9 Years
C: 10-12 Years

CBAAmbient Temperature

20°C

30°C

25°C

35°C

40°C 45°C

Number of discharge cycles and depth of discharge:
Do not discharge batteries more than necessary. Set buffer time limiter to the required buffer time. The number, as
well as the depth of discharging cycles is limited. A replacement of the battery might be necessary earlier.
When choosing the battery capacity, always try to get the next higher capacity than required. The depth of discharge
reduces the service life of the battery and limits the number of cycles.
Fig. 8-2 Battery degradation vs. discharging cycles,typ.
Cell Capacity

120%

C100%
B

80%

A60%

Depth ofdischarge
A: 100%
B: 50%
C: 30%

40%
20%

Number of Discharging Cycles

0200

400

600

800

1000 1200

Store batteries fully charged
Do not store discharged batteries. Keep batteries fully charged!
Charge retention is important to get the longest battery life. Stored batteries which are not fully charged age fasterthen charged batteries. Batteries which are not in use should be recharged at least once a year. The higher theambient temperature, the shorter the charging interval. At storage temperatures higher than 30°C, recharging should
be done at least every nine months.

Jun. 2021 / Rev. 1.1 DS-UZB12.121
All parameters are typical values specified at, 25°C ambient temperature unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0Germany6/6