These Amazon.com bulk battery packs are a great purchase! As a loss prevention officer, I blow through batteries often and do spend quite a lot on batteries to keep my flashlights and equipment running. These are even better than the major brand name batteries and last a lot longer. I bought two of these multi-packs and keep some in my emergency kits, emergency response bag, locker at work, home, and car. A must have for all loss prevention officers!