Learn to know

• Lessen the Lcd brightness and the Lcd lock timeout.

• Turn down your device volume with the volume keys.

• Close any apps or features when you are done using it so they will not continuously running in the background.

• Turn off the network connection if you are out of range so that your device will stop searching for a network signal.

• You should use the latest version of the software update. Software updates improves some features and fixes some bugs on the previous software version.

• Turn off the camera flash.

• The camera viewfinder can be a power drain, so after youve finished taking photos.

Increasing Mobile/Laptop Battery Life:





Battery Dos & Donts:

Dos:

• 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.

Donts:

• 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