If you messed up and bought a netbook with the low-capacity 3-cell battery and are now stuck with just three hours of battery life instead of 6, 7, or even 9 hours you could have gotten from the optional 6-cell battery, all is not lost.  Starting Sunday, Feb. 7, Staples has the Energizer Xpal XP8000 external netbook battery on sale for $79.99, a $20 savings.  It is about the size of a smart phone and can give you up to three extra hours of netbook power.  It is also versatile enough to charge your iPod or cell phone.  It comes with 6 cell phone tips, 9 Net Book Tips, iPod / iPhone tip, AC adapter, and carrying case.