Question HELP!? my lap giving bad performance

[Griff6955]

When I play a game, I get low fps until i remove my charger and plug it backin, then its smooth for a few mins then it goes back, for example 30 fps normally i remove charger then plug it back in = 80-90 fps then goes back to 30-40

 

[Griff6955]

When I play a game, I get low fps until i remove my charger and plug it backin, then its smooth for a few mins then it goes back, for example 30 fps normally i remove charger then plug it back in = 80-90 fps then goes back to 30-40