The XGB3 is an ultra-portable and lightweight 11Wh USB Battery Pack used for charging smartphones and all USB devices. Its rugged design makes it water, dirt and impact resistant (IP65), making it perfect for any adventure. Plug-n-play technology makes this battery pack rechargeable from any USB powered port including, AC adapters, car chargers, laptops and solar energy (XGrid Solar Panel not included). The XGB3 can be recharged with the XGS4 or XGS9 Solar Panels and USB Flex Regulator. An internal lithium-ion battery provides hours of extended run time.