In a message dated 9/7/2006 1:17:23 PM Eastern Standard Time, GoodwinG at aafes.com writes: You need four of the cells right? Should be 10 cells...each NiMH cell is 1.2~ volts, so 10 cells will get the 12v the unit needs. LiON cells are higher voltage per cell....but with no control circuit, using LiONs would be a fire hazard. A LiPO pack with internal regulator would be interesting...small, light and 3x the life. Andrew -------------- next part -------------- An HTML attachment was scrubbed... URL: http://listserver.themacintoshguy.com/pipermail/duolist/attachments/20060908/23433712/attachment-0001.html