If you use your laptop without plugging in, you know how frustrating it can be to run out of power. The sad fact is that batteries grow weaker over time. Every laptop manufacturer will tell you that batteries are "consumables" meaning that just like toner or ink, they are going to run out of functionality sooner or later. Yet, even fresh new batteries often don't seem to last as long as they should. Chances are, these 10 tweaks will give you a lot more time on battery power.