20 - 25, and i dont see runnin much hotter than that, unless maybe for an acoustic set, ie: keller, yonder maybe. just such a space saver, battery saver, and dummy proof. and the quality of your recording is not compromised by any of these factors. i can run the V3 and my deck for like 6-7 hours easy on this 6x8ah battery i have. so nice, compared to the 12x12ah brick i lugged around for the ad1k,plus the 6 for the deck and V2. i felt like a friggin slave driven laborer at the end of the night.