i run a large assortment of cameras and I'm always trying different batteries. i have used standard alkaline, rechargeable and lithium. i recently found the Duracell quantum that are suppose to equivalent to the energizer ultimate lithium, but considerably cheaper. i found the E lithium for 19$ for 20 and the Duracell were 17$ for 36 batteries. i bought 2 packs of the Duracell to try out, i am wondering if anyone has used them compared to regular alkaline and the energizer? thank you