The only brand I purchase and use ?.Excellent. Hearing aidsI believe this is the 4th or 5th order for Powerone batteries. I have used other brands including Costco, which are very good. Powerone lasts equally as long as the best, and I've had not one battery fail early or have anything out of the ordinary happen. For the price I don't know what could be better.As far as I know, they're the best.I have been using these for years now, they last as long as named brand for a lot less cost.La caja que contenia las baterias estaba en mal estado. por lo demas excelente productoA true example of you get what you pay for. The price is good, but these batteries last half as long as any other brand we have used.Good buy.Have been using these batteries for years. Five day lifespan in my hearing aidsVERY DISAPPOINTED ???I applied for a refund but was refused.Achat pour ma maman