mAh to Ah calculation formula
Q(Ah) = Q(mAh) / 1000
The electric charge Q in amp-hours (Ah) is equal to the electric charge Q in milliamp-hours (mAh), divided by 1000.
Ah = mAh / 1000
amp-hour = milliamp-hour / 1000
Electric charge (Q(mAh)) = 500mAh
Electric charge (Q(Ah)) = 500mAh / 1000 = 0,5Ah