Increasing Mobile/Laptop Battery Life:



       Unlike NiCad batteries, lithium-ion batteries do not have a charge memory. That means deep-discharge cycles are not required. In fact, it’s better for the battery to use partial-discharge cycles.
There is one exception. Battery experts suggest that after 30 charges, you should allow lithium-ion batteries to almost completely discharge. Continuous partial discharges create a condition called digital memory, decreasing the accuracy of the device’s power gauge. So let the battery discharge to the cut-off point and then recharge. The power gauge will be recalibrated.

Battery Do's & Dont's:

Do's:
  • Properly "condition" (fully charge/discharge for first 3 cycles) the battery when it is new. Keep the battery and the contact terminals clean.
  • Avoid exposing the battery to extreme heat and cold.Use the battery. 
  • If possible, avoid letting your battery sit dormant for long periods of time.
  • Use only the phone options and accessories that you really need.
  • Charge and re-condition a battery after an extended idle period.
Don'ts:
  • Toss, drop, or otherwise abuse the battery. 
  • Short-circuit the battery.
  • Open and expose the cell contents.
  • Modify the battery casing and/or housing.
  • Allow the battery to be exposed to rain or excessive moisture.Incinerate a battery. 
  • Properly dispose of a used battery.
Below is the table for different type of batteries and the best way to increase its life:
     
Battery care
Lead acid: Flooded, sealed, AGM
Nickel-based:NiCd, NiMH
Lithium-ion: Cobalt, manganese, phosphate
Best way
to charge
Apply a saturated charge to prevent sulfation; can stay on charge with correct float charge.
Avoid getting battery too hot on charge. Do not leave battery in charger for more than a few days (memory!).
Partial and random charge is fine; does not need full charge; lower voltage limit preferred; keep battery cool.
Charge methods

Constant voltage to 2.40–2.45/cell, float
at 2.25–2.30V/cell; battery stays cool; no fast charge possible.
Charge  = 14h
Constant current, trickle charge at 0.05C, fast charge preferred.
Slow charge  = 14h
Rapid charge = 3h
Fast charge   = 1h
Constant voltage to 4.20V/cell; no trickle charge; battery can
stay in charger
Rapid charge = 3h
Fast charge = 1h
Discharge

Do not cycle starter batteries; avoid full discharges; always charge after use.
Do not over-discharge under heavy load; cell reversal causes short. Avoid full discharges.
Prevent full cycles, apply some charge after a full discharge to keep the protection circuit alive.
How to prolong battery
Limit deep cycling, apply topping charge every 6 months while in storage to prevent sulfation, keep cells at or above 2.10V
Do not keep battery in charger for more than a few days, discharge to 1V/cell every 1–3 months to prevent memory (NiCd)
Keep cool, battery lasts longest when operating in mid state-of-charge of 20–80%. Prevent ultra-fast charging and high loads.
Storage

Do not store below 2.10V/cell; keep fully charged if possible
Store in cool place; NiCd stores for 5 years; prime before use
Store at 40% charge in cool place (40% SoC reads 3.75–3.80V/cell)
Disposal
Do not dispose. Lead is a toxic metal
NiCd: Do not dispose.
NiMH: Can be disposed in low volume
Can be disposed of in low volume