Some laptops come with a powersupply that isn't good enough to run the CPU on full speed so it will even throttle down when plugged in... (HP I'm looking at you

Some laptops come with a powersupply that isn't good enough to run the CPU on full speed so it will even throttle down when plugged in... (HP I'm looking at you...) If you have battery power left, it might run faster and drain the battery until it's low and then throttle down. Or just shut down like an older Samsung I saw once.