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. 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.