# How many amps should a car battery drain?

Contents

## How many amps should a car draw when its off?

The acceptable current draw should be around 0.03Amps. If that can’t be achieved upto 0.075-0.1 can be acceptable if the vehicle is driven most days.

## What is acceptable current drain on car battery?

A normal amount of parasitic draw for newer cars is between 50-milliamp to 85-milliamp current draw. A normal amount of parasitic draw for older cars is a reading less than 50-milliamp. Anything past these amounts indicates an electrical issue and should be addressed by a mechanic.

## How much power does it take to drain a car battery?

Between 60 and 100 Amp-hours is the average capacity of your car battery. The time until the battery is completely drained is about 8 hours. Between 4 and 7 hours is what you’re looking at, as the battery’s Amp-hour capacity decreases as the amperage draw increases.

## How long will a car battery last with a 10 amp draw?

The amp hours allow you to measure car battery amps through the practical lens of how long it will last between charges. If a battery’s ampere-hour is 100Ah, this tells you the battery can deliver 5 amps of power for 20 hours. If you used 10 amps per hour, it would last for 10 hours, and so on.

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## How do I find out what is draining my battery?

Pull the negative off the battery. Put the test light between the post and the ground wire. If the light illuminates, you have a draw. Use the fuse pull method to find the draw; when the light goes out, you found the draw.

## Will 2 amps drain my battery?

So, can an amplifier drain your battery? The simple answer is yes, but a car battery can only be drained when it sends more power than receives back from an alternator. In this case, the amplifier will drain the car battery, even when the engine is turned off.

## What drains car battery overnight?

This can be a result of various factors including the number one cause which is leaving headlights, glove box lights, or cabin lights on overnight. Parasitic drain can also be caused by defective fuses, bad wiring, and poor installation of a new car battery.

## How long does it take to drain a 12 volt battery?

If you drain it completely you will shorten its life a lot. So, assuming you want the battery to last, don’t discharge it more than about 50%, which will take about 5 hours. Limiting run time to 4 hours will do even better.

## How do you stop a car battery from draining when not in use?

If so, here are some things you can do to save your car battery when it’s not in use.

1. 1) Use a trickle charger or battery conditioner. …
2. 2) Avoid turning your car on and then off again. …
3. 3) Avoid short journeys. …
4. 4) Drive your car for 15-20 minutes at a time. …
5. 5) Alternate trips if your household has more than one vehicle.
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