The MAHA site states, ..."Delivers 2000mA of current for AA, C and D batteries, and 700mA for AAA batteries", but they don't specify how many D batteries could be charged, simultaneously at that 2 Amp rate.
All they say about the power supply (probably a humongous wall wart) is "100-240V 50 / 60Hz universal AC adapter", but there is no mention of the amperage output, nor is there is a picture of the power supply, itself. I'd hate to imagine how huge that thing must be, and how hot it must get, when working at full capacity.
Just the same, I had been wanting to purchase one of those 8-slot MAHA chargers for a long while, but got side-tracked, when I started buying Nitecore and XTAR chargers lol
Not pictured - 2nd XTAR SV2 charger, and 1 Nitecore SC2 charger, on its way