Size 312 Extra Advanced Mercury Free Hearing Aid Batteries (80 Batteries)

These are long lasting hearing aid batteries and come in a handy dispenser

The package would be hard to open if you do not have a good pair of scissors, but the safety element is worth the extra money for good scissors. The batteries last as long as others I have bought in the past and living out of the city quite a distance this allows me to purchase a larger quantity at an affordable price.

We ordered these batteries for my mom. She would change them and complain that they are NOT working. I even changed them for her thinking she may have mistakenly put the same battery back in her hearing aid - but no not the case - when we took the brown sticker off the battery, we noticed it left a white coating on the ones that would NOT work. I even used alcohol to clean off the residue but it didn't make a difference. We've ordered several times and never come across this problem before - Very disappointed in this product - my mother has a very profound hearing loss (without her hearing aid) it has been challenging especially trying to use these batteries this time! :(

I had previously bought this exact product from the same seller in May of 2023 and they were fantastic. As I read in reviews on multiple sites, they lasted longer than any other battery I'd used before. I used these with the Costco KS 9.0 hearing aids (made by Sonovo/Phonak). I reordered again and, after receiving them, installed two right away. One indicated low-voltage almost immediately so I tried another. That one also indicated low-voltage almost immediately. Upon taking out a third one, I noticed that the red tab sticker was rotted and the battery underneath was severely corroded. After checking a few more that looked like they'd be good, I noticed that almost every battery had some sort of corrosion. In the picture, the batteries circled in red are almost completely corroded (see one on the right outside the package). I then noticed that corrosion had started to form around the air holes on the positive sides even on those that had not been fully corroded. One way to see which ones will have corroded holes under the red tab sticker is to see if there is slight discoloration on the blister pack on the exposed negative side. In the photo above, batteries circled in red are obviously corroded on the negative side, indicating that the positive side will certainly be corroded away almost entirely. Those circled in orange have blemishes on the blister pack, suggesting that the air holes are almost certainly corroded. Some of the uncircled batteries have very small blemishes that don't show up in the photos. The interesting thing is that these are NOT expired and the date (12-12-2026) appears on both the box and the back of the battery packs. Perhaps they were stored improperly. Regardless, they are trash. I will be returning these.

No failures!!! After the frustration of “child/arthritis” safe packaging from OTHER BRANDS and constant 80% failures, what we have here is a WONDERFUL, great functional product. I know I sound over enthusiastic, but my hands are failing extremely fast and it’s so frustrating and insane to have the difficulty of just using my hearing aids. When you feel emotional because you need help just getting a battery out so you can hear… AT LEAST HAVING THESE BATTERIES THAT WORK HELPS. But more! I ordered 3 60 packs. A real functional product! Great, wonderful.

While the batteries are wonderful and keep my hearing aids functioning at their best for at least 60 hours of use, the packaging is almost impossible to open for seniors with decreased hand strength. I was hoping for some old style as advertised but these are child proof and almost senior proof too. I have to use a bone cutting kitchen scissor and then my hands hurt for several hours. You would think someone would have considered the people who use these when they were designing packaging!!

Long life batteries

Hearing aide batteries. They are batteries and come in a convenient dispenser. My 95 year old MIL still dropped them but it is a good product and a nice holder.