They are not lithiums and they don't last as long as lithiums. They are optimized for digital cameras and do well in that application, but they won't last any longer than alkalines in a light.I normally use the Energize Lithium's in my Ti AAA lights but I was intrigued by the Duracell's having never seen them before.
Are they worth the cash over the Energizer brand? A "better" battery? The same in a cleverly packaged 4 pack?