If I try to measure the remaining capacity of a Sanyo XX that my mouse reports as empty there is a huge difference between what C9000 and BC-700 report at 100 mA discharge rate.
C9000 usually reports that this battery has 0 to few mAh left in it and it reaches 0.9V immediately. But if I try the same battery in BC-700 it reports 200 mAh remaining. The voltage in BC700 starts at 1.16V and then begins to drop gradually during the next 2 hours.
It seems to me that Maha C9000 uses high current discharge pulses that effectively give 100 mA while BC-700 uses much lower current pulses (if at all). Thus I find BC-700 capacity measurement to be more accurate for lower quality and near empty cells as it simulates discharge rates of real life applications more closely. Except for digital cameras and such high tech gadgets.
There are plenty of low drain applications that really don't need super quality Eneloops to work properly and here I can use lower quality cells or older batteries with degraded resistance.
Here is another measurement done with lower quality cells. It shows that C9000 always reports less capacity than BC700.
Notice that even at 3 times higher discharge current, BC-700 measures more capacity from a cell than C9000.
My point is that if I want to do measurements at 100 mA, the charger should really use that current and not some 1A or 2A pulses that simulate 100mA. That's why I find BC-700 to be more accurate for measuring capacity of lower quality cells. After all, the purpose of these chargers is to analyze older and lower quality batteries. I don't need no analyzing of a new Eneloop.
Does anyone know how high discharge pulses are in C9000?