Jim, exactly,,,,, my thoughts are about using the a 3500 mAh HTC EVO 3D Li-ion 3.7V battery.These batteries are dual IC+ PCB proctect including over current, and short circuit with the ability to use USB charging, you could also probably stack a pair of these back to back and then have 7000mAh which would be some serious run time as well as being very thin and save lots of space. This would allow room for a nice size bottle of juice or even use a small bottle for stealthy-ness whichever you choose. I would love to also look at using a rectangular shape bottle, like a gas tank type effect to hold more juice. There is surely going to be some rather cool Mods coming out with these DNA chip's available now and hopefully the creative minds of some of the better modders think about some of these things, especially using these litium battery packs and the HTC EVO 3D Li-ion batteries. Only problem is I want it NOW
HAHAHHA