![]() ![]() ![]() Final ThoughtsĪ car battery can be utilized on a boat, but a battery designed for the marine industry can offer you a much better service. A reading of 10.4V and below means the battery is shorted. For a Gel Cell or AGM battery, your meter must show a 12.8V to 12.9V reading. ![]() Your DMM will create a sound and show the battery voltage on the screen.įor a wet cell battery, you should have a 12.4V or higher readings. Attach the red probe to the positive terminal of the battery and the black probe to the negative terminal.It will put your digital multimeter into the “Automatic Touch Hold Mode.” Press and hold the button in the middle of the rotary dial and turn your multimeter on.Turn the selector dial to the V DC function for you to measure DC volts. Attach the black probe into the COM terminal. Insert the red probe into the terminal of the multimeter’s face for volts, ohms, and diode testing.The cells should have the water acid liquid in them covering the cells otherwise, the battery dies. Water evaporates from them when the battery heats up underuse. Meanwhile, a wet cell battery normally has cells you can open and add water to them. You see, the boat motor on the boat will identify what cranking amps are needed to begin the motor. Such numbers tell you they react under a load condition and allows you to compare batteries of the same size with one another. Reserve Capacity, Cold Cranking Amps, and Marine Cranking Amps data are also often presented. Other batteries such as AGM batteries are often created as both and are considered to be dual-purpose batteries. However, it won’t last under constant use as a deep cycle can. On the other hand, a cranking battery could put out a great amount of current for a short period to crank a motor over to start it. Take note that the battery designation will be cranking or deep cycle.Ī deep cycle battery will put out a stable current over a long period. That enables you to receive the correct size, which will fit in the space you have for the battery. ![]()
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