Is it possible to use a Li-Ion laptop battery for driving a lighting system? I'm thinking about driving a 12v/20w mr16 with my laptop battery, which is a 14.4v 4.3Ah Li-Ion battery. Before I dig out the multimeter and some thin wires, was wondering if anyone has tried this with the smart batteries on modern laptops. How smart are these batteries in general? Does the onboard circuitry regulate voltage? Will it even supply power when the three 'comm' pins are not connected to the laptop? If it is possible (without serious risk of me becoming a 20 mph fireball... which i guess would provide some wide area illumination), it is certainly appealing, as it provides a very nice battery and i already have a smart charger for it! the battery is an 8-cell li-ion pack for a thinkpad.