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.

Unable to rate recent order (order delayed). Based on my 1st order I would give Rayovac Batteries a review of "5 Stars". All batteries worked efficiently; ordered other brands in the past and some batteries were dead!

I was SO thrilled to find these 312 hearing aid batteries that DO NOT COME IN A CHILD-PROOF PACKAGE! Ever since the battery companies have started using the new safety packaging I struggle to get the package open and have cut myself on one occasion. I ordered from this seller for two reasons: reasonable pricing and the non-child safety packaging. The order came quickly and in good condition.

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.

Worked out fine and the batteries are easy to get out of the package. So many today are too hard to get out of the package.

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. A followup on March 28,2026 We are finding some dead batteries in the latest order. When Mom replaces her hearing aid batteries she does not always wait for the chime indicating that hearing aid is working well. Some days Mom had trouble hearing all day long after putting in brand new batteries. When I finally checked her hearing aids I found one battery was dead even though Mom had put in new batteries that morning. It is possible that Mom simply mixed up the old and new batteries, that has happened before. When I pulled up a new battery, and let it breath for 5 minutes before installing it, that new battery was dead too. The second new battery that I tried was good and both of Mom's hearing aids worked as normal again. I am ordering a new package of batteries from another source because this last order is not reliable enough for Mom to be able to change her hearing aid batteries by herself. This is too bad as the first four times we ordered these batteries they were great. This fifth order is junk, what changed?

The Packaging is the star in these Rayovac Size 312 hearing aid batteries: You don't need an exxtra tool to get them out of a plastic cocoon. Just open the flap on the back, spin the little wheel, and there you have your battery. The batteries work well, lasting about a week.

Batteries work fine but package is very difficult for elderly to open

Doet wat het moet

Ok

Produto confiável, durabilidade média dentro do esperado.

Die Ausdauer ist gefühlt doppelt so lange wie von herkömmlichen Batterien vom Akustiker.

Yes. Longest lasting batteries