The JOBO GVEB01 External PowerPack for the Giga Vu Extreme will load its internal battery twice. Sometimes a job does not allow you to charge the internal battery of your Giga Vu Extreme. When that happens, the GVEB01 is the solution for you. The GVEB01 weighs only 10.6 oz (300g) and is very compact making it perfect for use on the go. Your Giga Vu Extreme AC Adapter will charge this unit with its 4 LED light status meter.