What will happen if your battery drops to 9v when cranking?

      by Phil Borges // in Articles

Have you ever had that feeling of unease when your car just wouldn't start? You turn the key in the ignition, and nothing happens – no sound, no lights, nada. You know that it's not a good sign when your battery is low, but what actually happens when the battery drops to 9v when cranking?

If your battery voltage goes down to 9v when cranking, the car may not start. The starter motor depends on a high voltage (12-14v) to turn over the engine. So when you crank your engine and the voltage drops to 9 volts, the battery power decreases, and it isn't providing as much power as it should. The starter motor may also get damaged if you continue to try and crank the engine with a low battery voltage over time.

It's a good idea to always keep your car battery fully charged or at least maintained above 50% charge. You can do this by driving your car regularly, keeping an eye on the gauge, or using a trickle charger. And if you're ever in a situation where you need to jump-start your car, try to find another vehicle with a healthy battery that has a similar voltage rating.

What should battery voltage drop when starting?

When you first start your car, the battery should have a voltage of about 12 volts. If it drops below 10 volts during operation, there may be something wrong with your alternator or charging system.

The voltage drop indicates that the electrical current is flowing from the engine through various circuits in order to generate power for lighting, powering interior accessories, and moving parts of the vehicle's suspension or brakes. The lower this number becomes, the more efficiently your car is running and/or if you've recently been driving on less than fully charged batteries.

If the battery falls below nine volts, it may not be able to start the engine. This is due to a lack of available electrical current that's needed for starting. If this occurs, you'll likely need a jump start in order to get your car started.

If your battery voltage drops to below nine volts, try the following suggestions:

• Be sure all accessories are turned off or unplugged before starting the engine; turn headlights and heater on for about 30 seconds with the key in the ignition before trying to start the engine (this will consume some power from the battery). You can also open the door to do this.

• Check the battery connections and terminals for corrosion or loose wires: clean if necessary before attempting a jump start.

• If there is no visible problem with your vehicle's charging system, you may just need to drive around for about 15-20 minutes in order to recharge batteries enough that they can turn over the engine again.

What causes voltage drop when cranking?

There are a few potential causes of voltage drop when cranking. The most common is the alternator not producing enough voltage to meet the needs of all components in use at once, such as lights and other electrical accessories.

Low-output batteries can also cause this problem, as it's hard for an engine to turn over without enough power from an electric motor or starter battery.

If your car has been sitting for a long time without being used, there may be corrosion on wires which need to be cleaned off before they can conduct electricity properly again.

And finally, if you've replaced one battery with another, but neither is fully charged yet (or ever will be), then you'll have voltage drop problems right away.

To fix all causes of voltage drop when cranking, you need to distinguish which components are drawing power and replace or repair anything that needs replacing or repairing. You might also need to upgrade your alternator.

If you're not comfortable doing this kind of work yourself, it's best to take your car to a mechanic and have them diagnose the problem for you. Once they know what's causing the voltage drop, they'll be able to provide a solution that will get your car up and running again.

Is 9 volts enough to start a car?

A car battery typically needs 12-14 volts to start, and the voltage from a 9-volt battery won't get the engine going. A car battery with a reading of 9 volts is considered low, indicating that the battery is weak. This may cause the car to stall when trying to start it. At this point, the battery should be replaced with a new one before any other road trip, or long drive is attempted.

What voltage drop is too low while cranking the engine?

A low voltage drop can indicate a weak or failing battery, a bad alternator, or a problem with the electrical system. If the voltage drop is too low, it can prevent the engine from starting or result in poor performance. Ideally, the voltage drop should not fall below about 12.0 volts for more than a fraction of a second when cranking or starting your engine, and it shouldn't stay there once you have started the engine.

The battery is an energy storage device that supplies electrical power to run all of your vehicle's systems while you are driving as well as supplying power to crank the engine. If the voltage drops too low while driving, it can cause all sorts of problems, including stalling or even a total loss of power.

The battery is essential for starting your engine, so it's important to keep an eye on the voltage and make sure it's not dropping too low. If you're having problems with your battery or electrical system, have a mechanic take a look and find the root of the problem.

If you can schedule a regular appointment with your mechanic, that's the best way to keep tabs on your battery and electrical system. This way, they can check the health of your battery and make sure everything is running smoothly. If there's a problem, they'll be able to fix it before it causes bigger issues down the road. Your car will be protected, and you'll be able to avoid an unexpected breakdown.

About the Author

Hi, I'm Phil Borges.. thanks for reading.. My wife says I can't shut up about batteries so to save my marriage I've started this blog .. where I'd be ranting about batteries! Please leave a comment if you have any questions, I'm happy to help!