[littlefreak]

There is a a battery that is a 1500mAh that will fit in the stock case. Ive scene them for like 70 bucks i think. They are 10% more mAh so you can expect maybe an extra hour or 2 of play time. This is the largest I seen and expect to see that still fits in the stock case. Also advance config has options to increase battery life by slowing down features on your phone when in idle though this shouldn't greatly increase your play time will increase your standby. I recently turned these features on and have notice a difference with my EVDO and my blue tooth on all day and still showing 4 bars of battery.