Battery connection error problem

I'm not able to charge my phone whenever I plug my charger to my phone it says battery connection error

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It should be a small error with contacting the battery's ribbon cable inside. Has the phone been subjected to any stress, i.e. drops, recently?

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No, first battery indicates wrong percentage like if my phone has low battery it shows 50% and then If i put it on charge it says connection error

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Good morning,

Judging by the fact percentages have been off, I'm guessing a BMS fault.

Have you tried a full reset of the phone &/or flashing of the software? Because software is the enemy to hardware unless they work together perfectly.

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@faizankhan33136 have you tried a new battery?

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