I was curious if maha measures same capacity when powered from different voltages - I tested freshly opened pack of eneloops lite (because I know when I discharge them all 4 together their capacities are exactly the same +-5mAh) and discharged two at 14V input and two at 11V input - results were exactly same - within 5mAh.
Another test I performed - I again used freshly opened pack of eneloops (in this case AAA lite) and I tested if charging slots are independent - So in slot 1 was measured battery and in other slots were ohers battereis charging/discharging and there were some differences:
first battery (solo) - 397mAh
second battery (other slots charging):407mAh
third battery (other slots discharging):393mAh
fourth battery (other slots charging again) :407mAh
So charging bays are slightly affected by each other but it is not very significant. Charger and batteries were cooled by fan to exclude temperature effect.