The only USB chargeable ones I use are 9-volt batteries, those are awkward and I dont want to replace my charger
Some devices care about the difference.
The tiny electronics that allows the lithium battery chemistry to be charged via microUSB also converts the 3.?v output to 1.5v.
The only USB chargeable ones I use are 9-volt batteries, those are awkward and I dont want to replace my charger