[Q] weird firmware fail code

hello guyz iv got this horrible problem that's bugging me
24 hours ago my new android phone"huawei mate" got problem with battery stuck at 50% level never changes with charge or discharge state.
now iv tried reset, update and sd card flashing nothing seems to help always comes back with update failed and error batt module failed as in screen shot.
my phone never been tampered with hardware or software wise
if you could help me how to solve this problem seems no one experienced this before

screen shot of update fail

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