I have bought several 8 packs of the optimum brand of your batteries I can tell you they stink., have used the In several applications snd for the extra monies they dont last as long as any other of the off he shelf akaline batteries. They just dont cut the mustard. Once I have finished the last if they few I have u will be switching to evereadys. I am so dissatisfied with the optimums as they just are not worth the extra money. User's recommendation: Ditch these batteries.