The 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.Features:- Lithium-Ion 3200 mAh rechargeable battery for NAO® RL headlamp- Easy charging with a type C micro USB port- Five-level gauge for precise monitoring of the battery charge level- Red lighting, continuous or strobe, to remain visible from behind at night and a separate button to quickly turn it on or off- Can be used as a spare battery to charge other electronic devices- Performs well at low temperaturesSpecifications:- Weight: 80 g- Technology: Lithium-Ion- Capacity: 3200 mAh- Number of charging cycles: 300- Charging Time: 3.5 h- Watertightness: IPX7 (waterproof in up to 1 meter of water for 30 minutes)