Add the eFire Goggle Battery to your gear bag to keep your Edge eFire Goggle powered up so you can ride longer with clear fog-free vision.
 
Full Specs
Replacement battery for KLIM Edge eFire Goggle
Rechargeable 7.4V Li-ion battery
Capacity: 7.4V 2800mAh 20.72Wh
For the battery box and remote charging block, 5V 1A charging is the most recommended/max is 5V 2A.