Re: Trolling motor battery voltage ??
Batteries can be safely charged at up to 20% of their Amp/Hr rating. If you are getting only 8 volts on the 2 amp setting the charger is not functioning properly. A 12 volt battery is a battery of six 2.1 volt cells. 6 x 2.1 = 12.6. Whether you charge at 2 amps or 40 amps, the output voltage should be 12.6 or even slightly higher. If you measure the voltage with the charger NOT connected to the battery you will not get an accurate reading.