The battery packs would be good for portable use as well, for bicycling lights or camping or extending the laptops power.
Love the Li-ion battery technology, I just bought six 3.7 volt 18650 batteries for my flashlight that pump out 2 amps a battery, the flashlight uses 3 18650 to power 3 Ultra bright 12 watt Cree xm-l LED's.
Those A123 batteries remind me of the lipo battery packs, but bigger.
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Save gas
Ride a Mtn bike for errands exercise entertainment and outright fun
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