Review on 50AA2500 EBL Individual Battery Charging System - Rechargeable Batteries by Jose Popal

I bought these batteries primarily for use in my Xbox Series X controller. Initially the batteries seemed to have good life and didn't have any real complaints for the first 6 months. After that, and probably after about 10-12 charges, the performance dropped significantly... Now, after 11 months of ownership, the battery life is about 6 hours or less. When I put new batteries in my controller, they don't fully register with my Xbox console. I also noticed that Quest 1 and 2 controllers have different speeds. Example: Install 2 batteries at the same time, but one controller dies before the other. Overall, I liked the idea of reducing alkaline battery usage, but I'm just not impressed with the longevity of these batteries.