This little gem is fantastic for all hopper fed blasters that use the same attachment as the GelStorm. It requires charging and I have to say to have the cap undone to see the charging status. It holds a good charge, and if you turn it off between games, it will last as long as the Gelstorm blaster battery. It puts a great charge into the gels and adds to the Sci-fi feel of shooting plasma or laster bolts. An absolute must have for the Gelstorm.