Petzl's Pixa 3R rechargeable headlamp battery is a Lithium-Ion polymer 930 mAh battery, it can be recharged by itself or on the Pixa 3R lamp (click here to view the product), with the charging base supplied with the headlamp. Fast loading in 3 hours. Instructions. Petzl Rechargeable Battery for Pixa 3R headlamp