I use 14500
batteries. I've had the AW IMRs and the protected AW ICRs.
I prefer the protected ICRs. They are higher mah and seem to hold up over time better than the IMRs.
I can't judge any of the regular AW Li-Ion protected batteries, but the ICRs work better for me than the IMRs.
They're higher mah as well.
BTW, AW batteries are made by Sanyo and Panasonic.
If you get genuine labeled Sanyo or Panasonic batteries from a reputable source, like lighthound.com or somewhere, they're just as good as AWs and usually cost less. AW (Andy Wang) just tests them and puts his labels on them. So does Panasonic and Sanyo before they put their labels on them. AW's aren't special or magic or anything, but they might be easier to find in certain sizes. Just sayin'.