Step-02: Connect the positive terminal of the 12V charger to the positive terminal of the trolling motor battery pack. Step-03: Connect the negative terminal of the 12V charger to the negative terminal of the trolling motor battery pack. Step-04: Turn on the charger and set it to the “trickle” charge setting. Turn the dial onto the '20V' setting and connect the red probe to the '+' side of the battery terminal and the black probe to the '–' terminal. It will then give you a voltage reading. '12.6v' means there should be sufficient power to start the car, so if it's not starting and you're reading 12.6v then the battery isn't at fault. You can charge a 6-volt battery with a 12-volt charger, but it is not recommended. Using a charger with too high or low voltage will be time-consuming, only marginally charging the battery, internally damaging your battery, and creating a dangerous environment. Rather than take this risk, always charge a 6-volt battery with a 6-volt charger. 10. Of the two, running it at higher RPMs will result in a faster/better charge for the battery. That said, It should be of note, the alternator really isn't made to be used this way, yet people do it all the time anyways. The alternator is more or less a device which replaces the energy lost to starting the vehicle and the small amounts lost Duration = Battery capacity (kWh) x 1000 / EVSE power (kW) x 1000. Or, for example, a car with a 65 kWh battery using a 6.5 kW charger would take this time to charge: Duration = 65000/6500 = 10 hours. Of course, a very rough calculation is shown. Remember to follow the recommended charging guidelines, regularly inspect your charger and batteries, and utilize multi-stage charging to maximize your batteries’ lifespan. PartsVu is here to help support all of your marine battery charging needs. 1-888-625-5460. A boat battery charger is essential for maintaining your boat's batteries. vQ4a.

charging a battery with a charger