Hawker has some single cell type lead SLA batteried. Gates made some that had great characteristics. This way you can build a staack less than the 12V ie 2V per cell nominal. Worth a look. I seem to remember they were a bit more money than other options. I remember the ad with an X cell and a paper clip glowing bright across the top. Larry > > From: Russell McMahon > Date: 2005/12/15 Thu AM 08:17:54 EST > To: PIC List > Subject: [EE] Battery choices > snip -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist