# How do I know what AMP my car battery is?

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Volts are a measure of voltage, while amps are a measure of current. You can find the amps from the voltage if you know the battery’s resistance, using the formula known as Ohm’s Law: Current equals voltage divided by resistance, or I=V/R. The ohm rating of your battery should be listed on the label.

## Is a car battery 2 amp or 10 amp?

You would use 10 amperes on a car battery and 2 ampere on whatever small batteries you might want to charge that still use the same voltage. For example, a motorcycle battery could use the 2 ampere charging option.

## What is the formula for calculating amps?

Amps = Watts / Volts

1. 4160 Watts / 208 Volts = 20 Amps.
2. 3600 Watts / 240 Volts = 15 Amps.

## How many amps do you need to start a car?

How many amps do I need to jump start my car? 400 to 600 amps will be more than enough to jump-start any normal, consumer vehicle. Commercial vehicles may require up to 1500 or 2000 amps. Compact and small vehicles can be boosted with as little as 150 amps.

## Should I charge my car battery at 2 amps or 6 amps?

Consequently, when trying to charge a larger battery at that rate, it will take a very long time and the battery may discharge at a greater rate than the 2-amp charge can provide. It is better to charge a deep cycle battery at a higher charge rate like 6-amps, 10-amps or higher.

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## Can you overcharge a car battery at 2 amps?

A: If you leave the charger connected continuously, even at a mere 2 amps, the battery eventually will die. Overcharging a battery causes excessive gassing — the electrolyte gets hot and both hydrogen and oxygen gas are generated. … On sealed batteries, the buildup of gases could cause the battery to burst.

## How many amps are deadly?

While any amount of current over 10 milliamps (0.01 amp) is capable of producing painful to severe shock, currents between 100 and 200 mA (0.1 to 0.2 amp) are lethal.

## What should a 12-volt car battery read?

A fully charged battery will typically display a voltmeter reading of about 12.6 to 12.8 volts. If your voltmeter is showing a voltage anywhere between 12.4 and 12.8, that means your battery is in good shape. Any voltage above 12.9 volts is a good indicator that your battery has excessive voltage.

## Can you leave a battery charger on overnight?

Even though there is no risk of overcharging with the use of a high quality charger, the battery should not remain connected to the charger for more than 24 hours. A full charge is usually achieved by charging overnight.

## Is Fast charging bad for EV battery?

Effects Of Frequent Fast Charging

An electric car’s ability to accept higher charge currents is affected by the battery chemistry. The accepted wisdom in the industry is that faster charging will increase the rate at which an EV’s battery capacity will decline.