These have been refurbished and checked for capacity. All have the new 8 stage fuel gauge and at least 90% of their original capacity.

2 cell battery built from 2 Panasonic 3400mAh 18650 Li-ion batteries in a hard-shell case.

Built-in fuel gauge displays remaining power. 

Will work with all Gloworm, Gemini, and Magicshine bike lights (except MJ-880)

Includes velcro attachment strap.