[Q] Note 3 random powers down topic

For about a Week my note 3 started to just power down. Sometimes it happens when I deactivate the lock screen or it might happen when Im just using my phone.

I have updated it to kitkat N9005XXUENB3_N9005OXXENB1_XEO and have tried other custom roms and it still is doing the same. PLEASE any advice would be awesome!

thanks in advance.