It works, but buy it inly if you broke your battery. Its around 30% worse than the original battery.
A store to avoid if you expect your battery to be at your home in 1 month or less (if you live in an european country). The battery has fake CE certification. Bad place if you are looking for a genuine xiaomi battery replacement. This is fake genuine battery but I must say they faked it very good to make you think it is genuine. My sincere congratulations for the guy that created and printed the label for the battery.