CommentStreams:D26db13d0549815694125d30f0d543d5

FWIW, I'm using a married set of LG HG2s (married here just means that they've always been used together, never as individual cells; it's likely unimportant here, as the power draw is minimal). These are unprotected, high-capacity, high-drain LiON batteries that can be had at places like IMRbatteries dot com for a few bucks a pop. Highly recommended.