The Voltwatch doesn't use enough current to really make any difference about wheather you can another flight in safely or not. Also Rodney is right on about checking the Voltwatch lights as soon as you land and before you turn the reciever off. A Voltwatch saved my Sea Fury because it only lit up only the last LED which is Red after a 3d flight. I believed the unit and stopped flying the plane. When I checked the reciever pack at home I found that one of the cells had gone bad. The voltage was good for the first 2 flights and dropped off during the third flight! If I hadn't had a Voltwatch to look at I wouldn't have suspected a problem after only 3 Flights! Thats why now I install a Voltwatch in every new plane as standard equipment. I did a review of one a few years ago where I checked the calibration of the units and found them to be very accurate and precise. [8D]