Don’t want to rushin and give Apple %85.00 for a new battery, then follow these tips from iPhone Atlas.

Use shallow charges — for the most part
Avoid extreme temperatures
Make sure your battery isn’t defective

Extending the time between charges (reducing power consumption)
Use Airplane mode when appropriate
Reduce brightness, use Auto-Brightness

More after the jump.

Optimizing iPhone battery life: Between charges and before replacement – iPhone Atlas: