Sometimes bme will also display X mAh, where X is smaller than the Y indicated by the resistor. Anyway, the default meter is wrong most of the time.

If normal mugens have the same design flaw as the big mugen, then there's a thermistor instead of resistor in it, which means the indicated capacity varies with temperature of battery at bootup time. At 20C, it works out to roughly 1300mAh, iirc. Pocket temperature corresponds roughly to half of that. This makes the meter even more confused than it usually is.


Amusingly Mugen got this right for their N800 battery. It tests out to have 1200 at slightly below low-battery warning threshold, and its resistor signals 1200mAh capacity as well. The label on the battery says "1800 mAh"