As Djozz has stated, a number of compact flashlights use CR123 and are compatible with rechargeable 16340/16350s. Current draw for these applications is 1-3Amps most commonly. But the nature typical of BLF forum users are to prefer higher current capable cells. So continuous 5A would be a good limit for this size cell, in my opinion. I feel that a minimum requirement is at least STRONG performance at 3A.
This is very exciting news! I love the 14500 size because I have a ton of AA/14500 lights that can use this. I have a number of Sanyo 14500P but always wish the capacity can be higher. This will help a bit. What cell is under the wrap? Surprise it can beat the Sanyo in energy density.
Also, did you send the Sanyo NCR21700A to HKJ for testing? Really like to have that on his comparator. It seems to be the best 21700 for most flashlight use cases unless very high current is required.
This is not a protected cell, it has no electronics that prevent overcurrent or overcharge/-discharge. The PTC is a one-time fuse that will blow in case of a direct short, all li-ion cells from major brands have that.
(vapcell) Thanks for stating the obvious and the offer of making something happen if needed. I have never witnessed such hostility on this forum to the protected cell form factor. As folks are heaven forbid injured moving forward it will unfortunately be difficult to spotlight but not hard to explain.