If this were rec hargeable out of the box I'd jump on it. Not up for buying Li-Ion batteries, rechargeable or otherwise, for a premium device like this. Seems like an awesome flashlight though, generally speaking.
DSpaceNineThis is an AWESOME flashlight (or 'torch'). I took mine on Safari in South Africa, and on the night rides, it held up to the hand-held spotlights that were used by the drivers. As for the batteries, I don't regret them not being rechargable one bit.
LeftybfhrggRechargeable 18650s from reputable vendors have never given me any problems. I've used Olight and Thrunite cells, and both are made by Panasonic. No issues whatsoever.
LeftybfhrggYou can buy a sumsang 30Q for 7 dollars...which is quite nice battery for that price....also it is high drain...push out 20 A.
However...it is unprotected.
DSpaceNineIt would have a battery inside anyway even it was rechargeable...and it is always better to recharge the battery by itself since a lot of built-in recharges can not recharge the battery to its full voltage.