Bought mine 2 weeks ago. Battery drain was crazy, from 100 to 0 in 7 hours. But after it completed learning my usage I now charge it once daily. It now lasts about 20 hrs on a single charge.
Honestly my A53 was misbehaving on one ui6, overheating and battery drainingBut ever since I updated to one ui7, battery life improved greatly and no overheating issues
