I'm checking on that by contacting our suppliers. Most I could find out otherwise was that it was good. I'm sure it also depends on the batteries. We may just have to experiment with it. If anyone happens to find out by using up the batteries, let us know. At least it has space inside to bring along extra batteries. On Tue, Dec 10, 2013 at 7:13 PM, <Foggddm@xxxxxxx> wrote: > I recently received the powered speakers in a case and think they are > excellent. How long is the expected battery life for continued use? > thanks > dale hayes -- Earn Money Fast! <http://www.earnmoneyfast.biz/> Click link to find out how! Unlimited Quality 4G Cell Service only $49 per month<http://www.solavei.com/roselady> Works with the new Google Galaxy Nexus!