A electric trolling motor's amp draw refers to how much amp (max input electric current) a motor draws at a given speed while being operated. A trolling motor's exact amp draw can be required from POER.
POER Electric Trolling Motor amp draw figures represent actual on-the-water conditions at different speed level settings (with all of the motor's wiring, LED display and switches in the electrical system while the test measurement is taken.)
The amp draw reduced when the speed level reduced.
To approximate how long a certain motor will run on the water, you simply take the battery's amp-hour rating and divide it by the motor amp draw. For example, for a motor that pulls 20 amps at medium speed using a 100 amp-hour battery, the run time would be: 100 AH/ 20 amp draw = 5 hour run time.