[AC Question]

Battery discharged rapidly below 40% so replaced it at Batteries Plus. New battery would charge only to 84% and would shut itself off randomly at opening of various apps. Batteries Plus replaced this battery but same problem. When it did randomly shut off, needed to be connected to charger to restart although plenty of battery charge, and time and date needed reset. Performed factory reset and Android reset without benefit. Is this a problem of faulty battery or some software problem that occured in the battery installation?