Spare battery for Voyager Solid E3D: Voltage: 3.6V* Typical capacity: 2200mAh* Initial charge time: 24h* Recharge time: 24h* Ambient temperature: 5 to 50°C* For replacement, please refer to the installation instructions for the luminaire. All values marked with an * are rated values. Unless stated otherwise, the values apply to an ambient temperature of 25°C.