Reflected status: After plugging in the power and restarting repeatedly, there is no response when pressing the switch button frequently.
1. The cell phone is not charged for a long time without electricity, resulting in the cell voltage being lower than 3.4V
Solution: Recharge and activate
2. The battery protection board IC is soldered (causing abnormal battery voltage output)
Treatment method: return the battery for repair
3. The cable is soldered and broken
Treatment method: return the battery for repair
4. Connector damage, virtual welding
Treatment method: return the battery for repair
5. The battery connector is in poor contact with the mobile phone interface
Solution: Reinstall the battery and make sure the battery is in good contact with the phone
For professional battery questions, please feel free to contact ！
