My phone will be shutdown by itself when unplug the charger cable

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Android Central Question

Help!! I DON'T know what wrong with my phone. It keep shutting down by itself when I unplug the charger cable , but it doesn't shutdown when my phone entering / entered to recovery mode or fastboot. The battery was completely fine.. Please help me..
 
Welcome to Android Central! Which phone? The battery may still be failing. Recovery Mode probably takes much less power than a full normal boot.
 
Keep in mind that it's a 5 year old phone, so the replacement batteries could be up to 5 years old themselves. That increases the possibility that the battery had already deteriorated on the shelf before you bought it.
 
Oh sorry, I missed the part about the battery working on another phone.

Make sure the battery contacts in the phone are completely clean. Use rubbing alcohol on a cotton swab to clean them.