i've run four hours with the batt light blinking via my ecocharge bp-50
kinda funny isnt it??? ;)not really THAT low of a light indicator!! ;Dbut yeah,mine came on about 5 hrs w/ just the v3 on, and it lasted about 10 hrs!!!
also, to better recreate a show, i turn it off after it would be about an average set because i believe more juice is used when power is turned on, correct???and this si how i would actually do it at a show!! and i still kept going....