Petzl R1 Rechargeable battery for NAO RL headlampThe R1 Lithium Ion rechargeable battery provides excellent lighting performance for the NAO RL headlamp, even at low temperatures. It recharges with a type C micro USB port and has a five level gauge for precise monitoring of the battery charge level. It is equipped with red lighting for visibility from behind and can be used as a spare battery to charge other electronic devices. Detailed description Description Lithium Ion 3200 mAh rechargeable