Until they make an institutional sized 80mile power cord you're going to need to rely on your laptop's battery. Unfortunately this doesn't work out to too much work time. Maybe 3 hours. However, a few simple rules can help you add a bit more time to your laptop battery. First, try using the power management feature on your laptop. Second, purchase a more powerful Li-lon batter like the IBM ThinkPad 570 Li-Ion Battery. Finally, make sure you correctly follow your laptop's recharging procedure.

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