Duracell Procell AA 24 Pack PC1500BKD09 (packaging may vary) | For smoke detectors, digital locks, medical devices, trail cameras; 10-year shelf life; reliable from -4F to 129F

Very good longevity good

Duran más que cualquier pila normal

good battery

I use massive amounts of AA batteries for my canon speed lights. Over the course of a week, I will use 8-24 batteries. It is a major component of my COGS, so cost is important. (Although I am starting to replace my battery affliction with rechargeable lithium battery packs, I have to pace myself because they have a very high cost per unit and cash flow is important.). I have used almost every major battery brand and here is why I think these pro-cell & ultra batteries are the best. They work 100% of the time. If you are not a photographer, you might want to stop reading here- When I buy Duracell copper top batteries in bulk from Big Box Stores, some will work for 200 flashes (4 AA's) and some will work for 50 flashes. Why? I don't know. I carry around a battery tester and when my radio transmission feature is not sending correct information, I check the battery level. Almost all AA batteries can be reliably used (in my speed lights) until the battery is run down to ½ of original power. After that, the communications become garbled and my receiver flashes may or may not put out the power that my transmitter is requesting. I have learned to live with this fact. Enter the Duracell Procell and Ultra. I can use almost all of the battery life and have been able to extend my battery usage about ⅓ more than before. I do not know why, perhaps these are kept in a better temperature environment before being sold to the consumer. That is only a guess- I really don't know.

Came in 2 separate boxes with 5 loose. Purchased for Christmas battery operated lights