I recently changed the battery of my P10 but the phone always died when the brandnew battery was still at 50%. It is no battery calibration issue - over the next ten days it got worse, died at 70%, now it frequently dies at 90%. The phone only starts with charging cable plugged in, then the battery charges from 90% to 100% in roughly one hour, but the "charged" battery only lasts about an hour or less, the phone dies when it reaches 90%. Looks to me like fake charging (or rather fake uncharging?). Is someone familiar with such an issue? Was the new battery defect from store? Or is the charger defect? The phone runs fine with power cable plugged in. Can it still be the charging board? Should I try the replacement shown in this article?