Rayovac Extra Advanced Mercury Free Hearing Aid Batteries Size 10 + Keychain (40 Batteries)

great for the price

I only use Rayovac at the recommendation of my audiologist. He advised that they last longer than other batteries. I have not used other batteries so have nothing to which I can compare these batteries other than Rayovacs that I have bought from other Amazon venders. These do not seem to last as long as batteries that I bought from a UK vender.

I have been wearing hearing aids for about 10 years and loves the rayovac batteries. I started running low and instead of buying so many I decided to try this smaller 4 pack. First I noticed some would die the next day, I needed new hearing aids and blamed them. Then half the batteries wouldn't work so I start taking brand new batteries out of the package and measuring the voltage, should be 1.4 volts and the first 6 I tested all tested around .2 to .3 volts Some tested zero and were completely dead.. They haven't expired so I have no idea whats wrong with them but they are pure JUNK..I have bought the 6 pack form a different seller and the Rayovac Extra would last 8 to 9 days consistently.

So far one fifth of these batteries for my hearing aid are dead immediately out of the pack. I only wear one hearing aid. Their expiration date is in 2018. Of the batteries that work some of them only last about 16 hours. Two fifths of the batteries do last 2 to 3 days.I purchased Rayovac Mercury Free Hearing Aid Batteries, Size 10, 24-Pack (L10ZA-24ZM) at the same time and those 24 batteries kept my single hearing aid going for 6 months without any bad batteries in that batch.

2-3 batteries out of each 5 pack are dead when you open each pack for use. Good till 2018 date on each pack, so they should be okay, but they are not. I wonder if they are having special pricing to get rid of short dated goods.Also, the batteries that do hold a charge, doesn't hold like they should. These batteries are for hearing aid, which is what I am using them for.

I ordered 10 cards with 4 10 batteries per card. I was out of town from December 31 to February 1. , I finally (today March 1, 2016) opened the box of batteries only to discover that they are dead, I tried two batteries from different cards, and my hearing aid was inoperative.. Bottom line is that you sell dead batteries....

They last only a day or two. Very disappointed with this purchase.

Most of these were duds. Exp date was nov 2016