On Fri, Feb 25, 2011 at 12:03 AM, Wladyslaw Zbikowski <embeddedlinuxguy at gmail.com> wrote: > Corey has a source for LiFe (Lithium Ion Phosphate) cylinder cells for about $3. Correction, this should be Lithium IRON Phosphate (LiFePO4). https://secure.wikimedia.org/wikipedia/en/wiki/Lithium_iron_phosphate