In HKJ’s review:
Search for “Charge NiMH”; there’s a bit that says: “The termination look like a voltage termination and without filling the cell completely. Generally it looks like the capacity display is a bit high for NiMH cells.”
Looking at the graphs, it seems to be falling short by about 10%. The charger shows about 1900mAh - 2000mAh, but HKJ’s equipment only shows about 1700 mAh - 1750mAh going into the cell. The effect appears to be consistent across all four slots.
In his conclusion, HKJ again mentions that: “The charger is very good at charging LiIon, but stops a bit early on NiMH.”
I’m wondering whether the person who wrote the charging algorithm forgot to account for the pauses while it’s measuring the cell voltage.