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.

Like the Xbox 360 and Xbox One controllers, the Xbox Series X/S controller uses disposable AA batteries by default rather than internal, rechargeable battery packs, such as those found in the PS3 ...

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 ...

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.