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

These batteries are the exact same as we were purchasing at retail Stores and from the audiologist. But they are less than half the price. They have great expiration dates and hold a charge longer than the ones we got at retail. The service is great through this company and were delivered even faster than the estimated delivery date.

After experimenting with a few different brands, this takes the cake. Lasts as long as any brand name battery and - most important - easiest to retrieve battery from packet.

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.

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.

Great batteries. Mom prefers these as they last a long time, about four to five 16 hour days, and they are economical. New PROBLEM: the last order arrived in CHILD RESISTANT PACKAGING. Mom cannot possibly open those packages by herself. I wore out a pair of scissors cutting through the tough poly carbonate packaging, maybe I should have used a bolt cutter instead, they are really tough to cut open. The previous four orders all arrive in regular packaging and worked perfectly well for mom.

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.

Repeat purchase, good value