Review on Xbox Rechargeable Controller Battery Packs (2 Pack) With 4 Matching Covers And Micro USB Charging Cable - Compatible With Xbox One/Xbox Series X S And Elite Wireless Remote - Play And Charge Kit by David Mcdonald

One of the battery slots blinks and doesn't consistently charge unless it's at the right angle. It's a cool product but I was a little disappointed in the quality. The batteries work great and last a couple of hours. Having 4 is a huge plus as you can always have one and keep the others charging, so the fact that one slot doesn't work actually doesn't impact the usage