My official Microsoft battery packs broke, and I didn't want to shell out $20 for a new one, so I got these. They both charge fine, and last as long as the real ones. So far, they work really well
Bought these to replace the original Xbox 360 battery packs I had. When they first arrived, I charged them to full, but they only lasted a short time. But after the 2-3 full charge they work great. I can get about 30+ hours of play per charge. I would buy again.