I bought it to replace the original battery of my phone, which after about two and a half years "swelled up", distorting the back cover of the phone, while also significantly losing performance.
The replacement battery is identical to the original, with the same specifications and the Xiaomi logo. As a non-removable battery, it is a bit noisy to change. With a video guide on YouTube, I attempted to do it. The battery fit perfectly and works as it should, charging and lasting as long as it did when I first bought the phone. Everything is good, except that while "prying" the cover to open it, small pieces of plastic (already worn out after 2.5 years) broke. This, of course, is not a fault of the battery!

Owner of Xiaomi Redmi 5.
Purchased in 2019.
Within a few months, the battery broke.
I bought one from China (because the prices hadn't dropped yet here in Greece) and it was small in size.
When I checked the prices for batteries on skroutz in 2020, I bought it again.