Im recently on a deep dive down the Battery rabbit hole, for AA/14500 Zebras, 18650 Zebras, and the Skilhunt H300, here is some of my recent learning
AA/14500 Zebras:
all batteries w USB ports are Protected Button Tops
14500 Button Top batteries w USB ports are the same length as Unprotected Button Tops
Only Button Tops fit in an AA/14500 Zebra
Flat Top 14500 are always Unprotected and do not work in a Zebra
AA Zebras dont have LVP for LiIon, so Protected Button Tops are safest, and USB makes them very convenient.
The Lumintop 14500 w USB-C Protected Button Tops have been working well for me in my Zebras (also in my D3AA and TS10).
AA Zebras battery check is unreliable w LiIon, they can read 1 blink when actually over 50% full.
18650 Zebras:
18650 batteries w USB ports are 70mm long, and they are always Protected Button Tops, that are 5mm Longer than Unprotected Flat Tops and do not fit in a Zebra
18650 Zebras Do have LVP and Only Unprotected Flat Tops will fit. They are 65mm long.
18650 65mm Flat Top batteries with Cold Weather ratings include the Molicel P30B
Skilhunt H300:
The Skilhunt H300 uses Protected 18650 Button Tops, that are longer than Unprotected Flat Tops
Unprotected Flat tops in the Skilhunt H300 will lose contact if the tail is bumped, because the battery is 4mm shorter than the Protected Button Top Skilhunt sells.
for a Skilhunt H300, there is a Cold Rated protected Button Top sold by LiIon wholesale. This is the battery I would buy if Cold Weather performance was a priority.
They also sell an 18650 Protected Button Top w USB-C, which is the battery I would buy to eliminate the need for the magnetic charging cable.
