A backup battery for any PWR modular product. Use this 10,000mAh PWR Bank as an additional battery for your PWR bike light, to charge your phone, watch, Garmin, Christmas mitten warmers...whatever device you like.   We aren't the first to seek a better use of batteries. Think about power tools that have a universal battery system. Each device powered by the same battery is another opportunity to save. Save the environment, save space, save weight, and perhaps most important to you: save money. After all, batteries often make up over 50% of the cost of these types of products.   FEATURES Compatibility - The 10,000mAh PWR Bank is compatible with the 600, 1000 and 2000 lumen PWR lightheads and PWR outdoor products. Charge your devices - Use this PWR Bank to charge your iPhone or cycling computer on the go. Battery - USB Rechargeable Lii-ion battery. Accessories Included - Micro USB cable.   SPECIFICATION Battery output: 10,000 mAh. Diameter: 48mm Ø.   INSTRUCTIONS Charging your PWR bank: PWR Banks use a micro USB input to charge. Using the micro USB cable provided you can plug this into any powered USB port or USB wall plug charger. Charging devices with your PWR bank: To charge a device, connect the device's charge cable to the female USB port on the front of the PWR Bank and plug the other end of the USB cable into an available powered USB port.