Part of my uncles estate is LOTS of rechargeable batteries and cradles. Matter of fact I grabbed a big tool box full of that stuff a few days to play with. a lot of 3.7 volt lithium for some reason.
And when I say a lot of 3.7v. This is just one box full that I grabbed. Plenty more are still in the house. So many things are still left to go through. But as a farmer / engineer. Most of it is at least cool. This pic was just taken after emptying a tool box I grabbed Friday while at the farm. I can’t bring too much home because I’m getting packed.
Yep, everything has gotten outrageous expensive. My experience with Duracells is that they do put out power longer, but when done and you forget about them they leak the most and cause more corrosion damage than other brands.