So my brother's iPhone 4S on iOS 7.0.4 has started to lose battery a lot. It drains too fast. Since his phone is jailbroken I installed BatteryDetective to check battery stats. This screenshot is from brother's phone with only 286 cycle count but maximum capacity is under 1000 mAh. I am also confused as the battery drain shows a positive and pretty high value. Now this screenshot is from my iPhone 4S on same iOS and it's stats seem proper and battery drain is a negative value. Can anyone interpret these and tell me what is wrong with my brother's phone. I am not in USA so I cannot get it replaced through apple store as we don't have any here.