S4 using Insane KK v9 and everything has been running smooth for a long time now but now the phone will randomly shut off when on battery (full charge). When I try to power it back up I get the samsung logo for a few seconds and then it goes blank and shuts off again. Battery pull results in the same, but if I plug it in again it might boot up normally, OR I get a grey battery pic followed by a green one showing a charge, but still unable to boot.
Any ideas?
Any ideas?