OK, it would seem that the consensus (well ALMOST) that the AA and CR123 are basically "must-haves" and the AAA is coming up quick.

I'll NEVER give on the "button" cell issue - they are insanely expensive and unique - you can't use a nicad or alkaline or oxywhatever or lithium CR2023, and I don't like that.

Now, the CR 123 - that's an interesting thing. It's light, dense (energy wise) and I suspect that it may become a new "standard". I know I can ger 123's at just about any drugstore, so that's good.

So, I guess it's AA, 123, AAA that's all to say.