Reader, [Fox9p3400], opened up an Xbox 360 controller battery pack so we could all see what goes into one. It contains two Sanyo 2100mAh NiMH AA rechargeables (Model HR-3U 1.2V). In addition to ...

The Xbox controller battery lasts 30 to 40 hours of gameplay when fully charged. High-quality AA batteries or the official Xbox rechargeable battery pack can ensure optimal battery life.