Why my battery drains so fast, cpu temp rises after update?

Hello everyone. I have got a leagoo Elite 1 with lollipop 5.1 one month ago. 2 days ago I accept the update LEAGOO_Elite 1_OS1.1.1_S160701. Since then the CPU temp rises (you can feel it and also see it in Clean Master, + 8-10 deg Centigrade) and the battery drains faster and it discharges after 12-15 hours instead of 28 -36h. Can anyone help me please? Thanks

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