Im using the Xtar AA 1.5V LiIon w USB-C in my AA/14500 Zebralight SC53c N:
I recently discovered an unexpected benefit of 1.5V LiIon
They produce Lower Flicker Index and MUCH Less Lux Riple than Eneloop or Lithium Ion. These tests of my AA Zebra come from my Opple 3:
(the green boxes on left are w 1.5V LiIon, middle yellow box w Eneloop, right red box w 14500)
Based on these tests, I am a Big Fan of 1.5V LiIon for my AA Zebra. I like using the AA 1.5V LiIon in my AA Zebra, better than Eneloop and LiIon, because of the lower Riple. The 1.5V LiIon also weighs 6.2g less than white Eneloop, and I like the convenience of USB charging.
Caveats:
My AA Zebra will run on H1= 300 lm without tripping protection, but be aware that the Zebra will exceed its 50C thermal ceiling, if using H1 longer than 5 minutes. There is no overheating problem at lower levels.
Disclosure:
I received the Xtar batteries as a review sample.