Self restart and power off

Hi there.
My english is not perfect but ill try be specific.

My phone:
Samsung Galaxy S3 i9300
Android: 5.1.1
ROM: 12.1-20150816-UNOFFICIAL-i9300
Kernel: Boeffla-Kernel-4.0-alpha11-CM12.1-NG-i9300-20150817 with Boeffla Config V2

My problem started when i changed the battery.
First was original samsung battery.
Now is this: QOLTEC i9300 3.7V 3100mAh

After replace battery my phone itself restarts (full restart). After 3 hours looking on him i counted 9 restarts.
Second problem is power off when plugin charger. Ofcourse charging is fine but i need to power on it himself.

Any ideas how fix this?
Thanks everyone for help.