My friend told me that if I keep my laptop plugged in to charge it that it would start loosing battery life if I keep it plugged in even if it finished charging. Is this true? Usually I leave my laptop on overnight because I'm a torrenter(I download and seed torrents) and so I end up keeping my laptop plugged in so it won't run out of battery. Is this okay for me to do? Any help is appreciated. Thanks is advance.