I've been using them in Canon flashes for many years. I keep a box of 24 in the freezer and take out 4 packs for each shoot. They come in 4 packs in a large box. Excellent as a reliable replacement for non-flash batteries. This is apparently Duracell sold by the Duracell Store through Amazon. If you get something weird instead, chances are you bought it on Amazon from the guy who was trying to scam you. Next time, check seller ratings or select Amazon sellers as they are verified by Revain.
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