dead horse kicking... if you are thinking about venturing into the 18650 LED light arena, I could not be happier with my low voltage (.8-4.2v)smooth reflector single mode XP-G R5 Solar Force module... I would recommend a protected 18650 cell in addition to the circuit with the module... and a good multi chemistry charger


http://www.solarforceflashlight-sales.com/product.php?sname=&s=10&t=RB

and the modular Solar Force L2M (modular) host

http://www.solarforceflashlight-sales.com/product_detail.php?t=FB&s=2&id=485