[Galaxy Y GT-S5360 General] CarlDeanCatabay:
Samsung Galaxy Young Battery Reference + Guide

All you need to know about SGY battery

Battery Info:

Standard battery:

Li-Ion 1200 mAh

Technology:

Lithium Ion

Stand-By:

Up to 850 h (2G) / Up to 540 h (3G)

Talk Time:

Up to 17 h (2G) / Up to 6 h 20 min (3G)
​

Li-Ion Battery

A lithium-ion battery (sometimes Li-ion battery or LIB) is a family of rechargeable battery types in which lithium ions move from the negative electrode to the positive electrode during discharge, and back when charging. Chemistry, performance, cost, and safety characteristics vary across LIB types. Unlike lithium primary batteries (which are disposable), lithium-ion electrochemical cells use an intercalated lithium compound as the electrode material instead of metallic lithium.
​

Battery Cycle

Battery Cycle Life is defined as the number of complete charge - discharge cycles a battery can perform before its nominal capacity falls below 80% of its initial rated capacity. Key factors affecting cycle life are time t and the number N of charge-discharge cycles completed.
​

Battery Life

Battery Life is the elapsed time before a battery becomes unusable whether it is in active use or inactive. There are two key factors influencing calendar life, namely temperature and time
​

How to prolong battery life?

Similar to a mechanical device that wears out faster with heavy use, so also does the depth of discharge (DoD) determine the cycle count. The smaller the depth of discharge, the longer the battery will last.

If at all possible, avoid frequent full discharges and charge more often between uses. If full discharges cannot be avoided, try utilizing a larger battery. Partial discharge on Li-ion is fine; there is no memory and the battery does not need periodic full discharge cycles other than to calibrate the fuel gauge on a smart battery.
​

Li-ion does not need to be fully charged, as is the case with lead acid, nor is it desirable to do so. In fact, it is better not to fully charge, because high voltages stresses the battery. Avoiding full charge has benefits, and some manufacturers set the charge threshold lower on purpose to prolong battery life.
​

Ideal battery Charge Time

3.7 V Li-ion Battery

120 mins - 65%

135 mins - 76%

150 mins - 82%

165 mins - 87%

180 mins - 100%

Simple Guidelines for Charging Lithium-based Batteries

A portable device should be turned off while charging. This allows the battery to reach the threshold voltage unhindered and reflects the correct saturation current responsible to terminate the charge. A parasitic load confuses the charger so turn off your phone when you are charging the battery.

Charge at a moderate temperature. Do not charge below freezing. Do not charge your phone in your fridge :D

Lithium-ion does not need to be fully charged; a partial charge is better.

Discontinue using charger and/or battery if the battery gets excessively warm.

Before prolonged storage, apply some charge to bring the pack to about half charge.

Over-discharged batteries can be “boosted” to life again. Discard pack if the voltage does not rise to a normal level within a minute while on boost.

Battery Calibration

What is battery calibration?

Battery calibration is a complete discharge and charge cycle of a battery that helps the batteries charge and discharge performance.
​

Any methods of doing that?

Yes, aside from full charge and discharge, you can delete batterystats.bin which is available on ClockWorkMod recovery under Advanced and Debugging.
​

Deleting batterystats.bin, cool! -no it's not!

Deleting batterystats.bin is a Myth! Read this article from Google+ by one of Android engineers Google+ Article
​

Sources:

Wikipedia - Lithium-ion battery

Battery University - Learn About Batteries

Electropedia - Battery and Energy Technologies

Dianne Hackborn's post about batterystats.bin - Google+