DB, Sorry to sound repetitive but EDig's new tech regarding longer hourly usage on the eVu has nothing to do with batteries as I understand it. RP was quite explicit in explaining to me that it was the MOS's management of the power output needed to run the eVu that gave it longer battery life. Using the MOS in the eVu requires less power to run it so therefore the battery doesn't run down as quickly as it would in normal operations. Perhaps Doni can explain much better than I.....Frank