We hope you get the perfect automotive amp clamp from our above list. Clamp the battery charger’s red (positive) clamp over the red battery terminal. Car batteries have a capacity ranging from 550 amps to 1,000 amps (cranking amps) depending on the battery’s specifications. There are clamp meters that only measure current, general purpose multimeters with integrated clamps, and clamp attachments that plug into standard meters. Connect the red positive clamp to the battery positive terminal. You can also use to charge other batteries such as for motorcycles, golf cart, and other small things. This is not only made for car batteries. Once this number is set you will be able to determine if the item is drawing the amount of current that it needs. An average car battery has a capacity of around 48 amp hours which means that, fully charged, it delivers 1 amp for 48 hours, 2 amps for 24 hours, 8 amps for 6 hours and so on. To use your Schumacher charger, follow these steps: Connect the clamps on the charging cable to the corresponding terminals on the battery. That is the "optimal" power supply you need. For example, if the item is going to draw 10 amps, you will want to dial this into the ammeter. Once you do this, the charger will show the cell voltage and determine the charging period for the battery. Look for RMS watt on your amps specifications per channel. This means that a car battery’s amperage is more than 300 amps. Using the Schumacher battery charger is quite easy and doesn’t require any complicated steps. In this article, we have reviewed the best automotive amp clamp for our readers. “Why do I get an amp reading on a car battery with an AC only clamp meter?” The battery voltage is DC, however the current is not. 3500 is usually the maximum burst output of the amp if all channels are used. Step 4: Place Clamp on Wire. They are entirely different from those trickle charger that you can use for the car batteries. OTC's AMP clamp/multimeter was designed to allow accurate current measurements using clamp jaws. Add that to the number of channels used. The trickle charger that is compatible with those mentioned is the one amp, and two amps trickle charger. When the engine is running, the alternator is charging the battery. Using your thumb to open the jaws of the clamp you will need to place it … If you didn’t find your desired one then check out General Technologies Corp GTC CM100 1 mA to 100 Amps AC/DC Low Current Clamp Meter one of the most valuable items in the market. 2 nd Method (Recommended method) Get any 12-volt Trickle Charger. Many car owners simply jump-start the car and let the alternator charge the battery. An amp have watt ratings per channel. Starting a car engine with 4 cylinders takes around 300 cranking amps. Be careful, though. 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