The battery I received from the cheapest store (purchased on 6/9/22) is completely useless. I had already replaced the battery with a purchase from China, which was not as good as the original Xiaomi one but lasted for about a year and a half. The one I bought now didn't even last two weeks. It has already swollen to the point where the screen is distorted, the side buttons do not meet the board, and the SIM card is stuck and difficult to remove. With a full charge, it doesn't last more than three hours and shuts down without warning before reaching 40%. Even if it was given for free, it's not worth the trouble to replace it. I'm waiting to see how the seller will respond because the product page claims it should function well for four months.

On 2/11/22, the store replaced the battery for me through Scroutz. For the past two weeks that I have been using the phone, I haven't encountered any problems. The previous battery definitely had a serious issue. I hope this battery lasts for a year. If it lasts for the price and six months, it will be good enough.

I chose it to replace the mother battery of the red Mi 4 pro, which had weakened and needed daily charging. I changed it relatively easily and the biggest difficulty I encountered was disconnecting the battery from the mobile phone's circuit board, it required patience....after that, things became easy. The problem: the battery lasts less than the original (mother) battery and takes more time to charge....I also tried another after-market battery (not Xiaomi) but it's not like the mother one.