The energizer 392 is in a few devices I use and works flawlessly. My biggest concern is where to find them as I need four more for two electronic birds that last had their batteries replaced many years ago (and battery compartments are clean by the way - no rust). Energizer makes a great product and the explanation above is a testament to their sincerity. Hearing aid batteries are supposed to be replaced often. And if Hogi is sanding rust off of them, well that's not often! Owning cheap hearing aids doesn't work either!
I've used this product for:11-20 years
My primary use is:Personal
I purchase specialty batteries at:I don't, they come with my devices