I use this product in mini Avanti EDF 8cell.
I tested 5 flight. and it is very accurate. when I compare with charged mah with telemetry data after flight. mostly less than 20mah difference out of 2500 mah.
I also put current alarm to voice in futaba 18Z. and I found my max current is about 117A during flight.Rating: [5 of 5 Stars!]