Battery Issues Since Lollipop Update

[Harvmeister]

Since I got this awful update my S4 has become almost unusable. As soon as I take it off charge and use it for 5 minutes I'm down to around 85% and then after 30 minutes it will be down to 60% depending on use.

The main problem is that sometimes the phone will die before it the battery is even low. A few weeks ago it turned off at 17% and then it happened again a few times but today it turned off at 57%. I'm finding this really frustrating and I've done a factory reset and tried to clear cache partition but nothing has changed.

 

[Ian Morgan2]

Settings/ Battery.....what's hogging the percentages ? Tap on the graph for further info. Have you got good wifi/mobile data connections (?)....it "sounds" like the phone's struggling to hold the connection.
Are you running an A/V app ?