I went into my local Target (large department chain store) and discovered AAA Lithium batteries. I had not seen AAA size (also known as type L92) on the market before. Perhaps I just missed them.

Price was $9.69 for 4. ($2.42 each) A bit high it seems to me. I normally buy AA sized (L91) at Sams Club for about $19.00 for 12 or $1.58 each.

I looked up the specifications on the Eveready web site and it is rated at 1250mAh. The regular alkaline battery is rated at 1200mAh so the gain is trivial. Weight is considerably less at less than 0.5grams (0.02oz) for the lithium vs 11.5 gr (0.4oz) for the alkaline.

So weight and storage life seem to be the factors here as there is little difference in capacity. But when I think about carrying the little beasties, then weight becomes a factor. I normally carry lots of battery operated devices and a back-up supply as well (when hiking, not EDC). Because of the very low weight of the Lithium type batteries, I usually carry a replacement for everything, meaning 12 AA (4 for Ham radio, 2 for GPS, 4 for camera 1 for small LED light leaving 1 extra) and 6 AAA (4 for larger LED light, 2 for palm computer).