aside from li-ions, I use 1150mAh AAA's.... that's a claimed capacity, not sure if they actually could be.

I bought them on ebay.... they definitely last longer than the RS and energizer AAA's I have. They can also stand up to the 15 minute charger I have. THe cheap ni-mh that I got from walmart couldn't.... two of them popped in the 15min.

I'd order more, but you can only get them with a charger. I can't find the seller on ebay where I got them. Stay away from powerizer too... I have some AA's by them and they suck!