Negative Delta V vs Zero Delta V

The default -dV value of my charger was 3 mV. I had to set it to 0 mV. Why? Because it was cooking my batteries!

I had several problems with the default value:

Since I switched to 0dV the charger did not miss a single termination and the old cells fill up before overheating.

Recommendation: For charging NiMH cells use 0dV when possible or the smallest -dV value possible.

AA Cycler