REDMI NOTE 9 PRO BATTERY BATERI BN53 Free Opening Tools ▶ Premium quality battery. ▶ 0 cycle ▶ brand new battery Warranty: 180 days warranty 【Self-Investigation】 The battery needs to be replaced if your phone is ▶ suddenly switch off ▶ the battery needs to be charged more frequently than before ▶ can't charge ▶ Phone rebooting on low battery percentage ▶ Battery percentage jumps Why after changing the part but the problem still exist? It might be ▶ U2 ic, if very rapid battery drain ▶ U2 ic, if can't charge on a dead battery, but can charge a partially charged battery ▶ U2 ic, if not charging, doesn’t respond to charge or won't go above 1% 【Friendly Reminder】 ▶ Please use up all the power of battery until your phone shuts down automatically, then charge it till full, repeat for 3-5 times. Hence, the battery will be in its optimum stage ▶ In the beginning, the battery will drain quickly due to the li-ion of a new battery is unstable. It will become normal after few times of full charge. ▶ Special skill and techniques required for proper installation. ▶ No installation instructions will be provided. This is not an easy job for someone who has no experience at all ▶ Strongly recommend looking for PROFESSIONAL for replacement. We will not hold responsible for any damages to your mobile phone that may cause during the replacement process ▶ Only use glue/sticker/double tape that specific for the mobile phone spare part only. Do not use UHU glue, super glue, gum gajah and etc. We won't proceed for any warranty / refund if you use the wrong glue ▶ You might need to calibrate your battery to get accurate battery health/condition. Calibrating the battery is pretty simple, but takes a bit of patience. Just drain the battery until your phone completely dies, and then charge it all the way up to 100% without interruption.