I also don't see where Fasttech or Wallbuys has NCR18650PD protected cells. In my opinion them and the UR18650FM are the two best protected cells right now. Based on their discharge curves
The protection on the PD trips at 7A, so having protected cells aren’t that useful if you want super high discharges. For high current situations you want the UR18650FM because it’ll last the longest, then the NCR18650B, then A and then PD last. PD is best suited for discharges higher than the UR18650FM and NCR18650B can handle without noticeable sag, eg. 6A+ (which is not common).
If you’re only using at 3A the NCR18650Bs win runtime wise, and at 3.5A+ the UR18650FM win.
They sell Panasonic NCR18650B 3400mAh which is what KeeepPower uses.
If you look here even though it says 7A trip during the testing it tripped at 9A. http://lygte-info.dk/review/batteries2012/EnerPower+%2018650%202900mAh%203C%20%28Blue%29%20UK.html
Look at the comparison here: http://lygte-info.dk/review/batteries2012/Common18650comparator.php
The 3400 beats the 2900mah up until 3A. At 1A and 2A I agree the 3400 is better.
Kind of stocked up for now, but would be nice to have a US source for these again.
Btw, quick note, the 18350 batteries are A LOT longer than their unprotected counterparts. I have two, and have never actually been able to use them, just charged them, and then discovered they are too big to fit.
If you do stock them, getting 16340's and 14500 would be a safe bet.