I had a 10 year hiatus from taping and had a dead Eco charge for my V2. So glad I went with a Naztech knock off and a cable from TAKables. I use about 50% of the battery running at the same time a V2 (9V) and DR-100 (5V) for about 3 hours or so. Obviously, a lot more universal and can easily run phones (audio player), speakers, etc all day on brew days and such too.