I've ruined a battery by keeping it in my laptop, when it's plugged into the wall at my desk, letting it get very hot for several hours a day. It's a small pri

I've ruined a battery by keeping it in my laptop, when it's plugged into the wall at my desk, letting it get very hot for several hours a day. It's a small price to pay for the convenience of being able unplug my laptop and go elsewhere without fussing about.