If you figure the average AA battery is 1.2 volts, then it's okay to assume the Xbox Core controller requires a minimum of 2.4 volts, giving an average of 2,100mAh per battery pack in this kit.

That's just $5.85 per battery pack. As a comparison, the official Micorosoft Play & Charge Kit will run you $25, and that is for a single battery pack. Two Xbox Controller Battery Packs for $11.69 ...

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 tha… ...

The PowerA Play and Charge Kit for Xbox is discounted for Amazon Prime Day, meaning it's the perfect time to snag some rechargeable kits and say goodbye to single-use batteries.