RayovacMercury Free Hearing Aid Batteries, Size 13, (L13ZA-8ZM), 8-Pack

perfect condition. Works better than the batteries I had..

just great

Very good quality, will definitely purchase these again.

I've tried many different manufacturers of #13 batteries in my hearing aids and these seem to land somewhere in the upper middle in terms of longevity. I've used 3 pair so far and get about 105 hours per pair - which for me lasts 7-days.As is recommended, I air expose the batteries for several minutes before inserting. And, I DON'T stream or use Bluetooth.Also, as with other brands I've used, don't be tempted to bargain-purchase in bulk if you can't use the batteries within 6-months. All brands I've tried so far lose their charge over time, even if left in a sealed package.

Unlike other hearing aid batteries I have used, these don't last even a week. And, each side "dies" at different times. The most recent exp. my left battery died after 3 days. My previous experience was they both typically die at about the same time. I usually buy them through my audiologist but decided to try these to avoid a trip to their office. Very disappointing. Next time I will buy through the audiologist.