Rechargeable battery for NAO ®  RL headlamp 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. Detailed description 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 temperatures Specifications 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) Certification(s): CE