Another question for the regulars here:

Any reason (other than price) not to go with Li-ion over NiMH? BatterySpace has a sweet deal on a prebuilt 11.1V 7200mAh water bottle battery, 100 bucks including the charger:

http://www.batteryspace.com/index.as...OD&ProdID=2217


It's a little more capacity than I "need", but it's only 20 bucks more than I'd spend on the NiMH battery I "need" plus charger. Plus it has lots more capacity, weighs less, and is less work than making a water bottle battery out of cells or packs myself. Any "gotchas" I should be aware of with Li-ion? Should I add an extra inline fuse between this thing and my lights just to be on the safe side?