How to improve my battery life?

So i charged my iphone the whole night and it was 100% in the morning and i used 3g for one hour (not all at once) and my battery is 48% now. It gets low very fast and i don't know how to improve my battery life, how to make it last longer

Cell/mobile phones have their own section under the CONSUMER ELECTRONICS tab.

Post your question there. IPhone questions do not belong in the CARS & TRANSPORTATION section.

It may be too late for this battery, but Lithium Ion cell phone batteries last longer if you charge them when they're down to a 50% charge. If you've run this one down to zero, a large number of times, it may need to be replaced.

This is the automobile section.

Proper maintenance of your car battery can increase it's life and performance. Just follow some simple but vey useful tips to maintain your car batteries are:

a. Clean the dust from your car battery on regular intervals, because it can cause corrosion

b. If you find any kind of corrosion in your car battery, use solution of baking soda to wipe it out

c. Clean the battery surface or case on regular intervals

d. Periodically inspect the battery for several types of damages like fluid leaks, shell cracks, etc

e. Keep you car battery always fully charged

f. Keep battery connectors like the wire clean

g. Keep terminals and cables tight to prevent entry of toxins in the battery and also ensure proper flow of electricity

h. To lubricate cables of the battery use Vaseline and petroleum jelly on regular intervals

i. Switch off music system, air-conditioner and lights, when it is in idle condition

j. Check the fluid level of the car battery on regular intervals to ensure full fluid level

However, we recommend that you take proper caution while following any of the above tips as battery is an acidic and electrical device which may cause injuries if not handled properly.

You need to let them die completely about twice a year so the charger can recalibrate. And, batteries go bad. It's not hard to replace if it's a 4 or 5.It's a real bear if it's a 3.
Things that drain the battery are location services, Bluetooth, wi-fi and not shutting down the 35 programs running in the background.