I’m using a CC/CV DC power supply to charge them.
I was charging them to 1.9v but the capacity is dropping so I am now only charging them to 1.8v
They are not being discharged below 1.2v
I’ve adjusted the charge rate to 100milliamps or less.
Discharge rate to 100 milliamps or less.
They do seem fragile.
See my review and test results here……
AAA NiZn Batteries