Phone goes dead with black screen at 23%
I've had my S4 since July. The first few weeks the battery life was great, since then it has become increasingly worse with an average of 3 hrs life after each charge now. I've read all the related threads regarding battery life and have implemented the suggestions but nothing has improved the life of the battery.
The last couple of days as the battery has reached around 23% the phone just dies. The screen goes instantly black and is completely off without having been switched off or going through the process of switching off.
The phone does not switch back on again, the only way to get it back on is to charge it at which point you can see from the battery charging display that there is still charge left in the battery.
Would anyone have any ideas about this please?