My biggest fear was moving away from AAA's to CR2032 lithiums - they don't last *as* long but my tikka lasts for bloody ever on 3 AAA's, and I can find CR2032's cheap like dirt and a few spares plus the ones in the light weigh less than 3 AAA's - were I resupping on a long thu hike I'd think twice because I can buy a AAA batt a gas station, unlike a CR2032 - but realisticly for most of the 3 season hiking I do the E-light is fine.

(BTW, I find batteries at princess auto, or online at computer parts places in stacks - CR2032 is a standard motherboard battery for PC's <img src="/forums/images/graemlins/smile.gif" alt="" /> - but even MEC sells 'em cheap )