Can I Charge a Lawn Mower Battery with a Car Charger. Jump start lawn mower

Can I Charge a Lawn Mower Battery with a Car Charger?

There are only a few things that riding lawnmowers and standard vehicles have in common, one of which being the use of a battery to start up and run. So, if you happen to have a lawnmower with a dead battery and only a car battery charger nearby, can you, and should you, use it to charge it? Can you charge a lawnmower battery with a car charger? Yes, you can charge your lawnmower’s battery using a car battery charger; simply connect the mower’s battery to the charger using the jumper cables that are already attached to the charger. However, this process only works on 12-volt batteries. This is definitely a process that you can carry out within the boundaries of your own home without the need of professional help. However, there are some precautions you must take to avoid causing any damage to your lawnmower or your surroundings.

Why Do Lawn Mowers Run Out of Battery?

Everything eventually runs out of battery power. However, many cars and lawnmowers use gasoline to keep running and have a mechanism in place that will keep recharging the battery as long as it is functional. Therefore, you might be wondering: Why did my battery run out when I wasn’t even using the mower? The answer to this question is usually cold weather. Lawnmowers use lead batteries, which are known to slowly discharge under cold temperatures. Therefore, if you are facing this problem in the spring, it was most likely the freezing temperatures of the winter that caused the problem, and this is entirely normal. If your battery is damaged or you know that something besides the battery is wrong with your lawnmower, don’t hesitate to contact a professional; handling lead batteries can be dangerous.

Preventing Battery Drainage

One thing you could do to avoid your battery discharging during the winter would be to store your lawnmower somewhere where the temperature is not as cold during the season. Also, you could turn it on now and then during the winter months so that the battery recharges. However, you are most likely reading this article because your battery is already discharged, and you are looking for a way to bring it back to life using your car battery charger, so let’s get right into it.

How to Recharge a Lawn Mower’s Battery Using a Car Battery Charger

This method is a pretty good alternative for charging a dead lawnmower since it is efficient. The battery charger even has multiple fail-safes in place to protect you against any accidents that may occur due to the battery overcharging.

A word of caution: Do not do anything outside of what is mentioned in the steps above and be careful with where you connect the jumper cables. The charger may have multiple fail-safes, but you don’t want to find out how far they will go when it comes to avoiding accidents.

Battery Charging Alternatives

If you don’t happen to have a car battery charger at your disposal or you are not able to purchase one, there is another method that you can try: using your vehicle’s battery itself.

Note that this alternative will not effectively charge your mower’s battery to its full capacity, but should give it enough of a boost to start it up and move it where you need to. In addition, this method will only work on mowers with 12-volt batteries.

This process is pretty simple and straightforward and works similarly to how you would jump a car using jumper cables attached to another vehicle’s battery:

  • The first step is to locate your lawn mower’s battery, which is usually found under the seat.
  • Then, get your car close to your lawnmower. You want the hood of the car to be facing towards the mower so that the jumper cables can reach both batteries.
  • Make sure you turn off the car and set the brake in place, since having the engine running during the whole operation could result in either one or both batteries being damaged.
  • Next, you should open the lawn mower’s battery compartment under the seat so that it is exposed, and remove the plastic covers protecting the battery’s terminals; do the same for your car’s hood and battery.
  • The order in which you connect the jumper cables is crucial: The red cable goes first on the positive terminal of the lawn mower’s battery, with the other red end on the positive terminal of the car’s battery. Then, the black cable must be connected to the negative terminal of the car’s battery, and the other black end on a piece of metal on the lawnmower’s frame. Make sure that where you attach the black cable on the mower is not near its fuel tank or battery.
  • Now that the cables are connected, try starting your lawnmower to see if it worked. If it did not work, then don’t worry, leave the batteries connected for a few minutes and later try again. Once the mower is up and running, disconnect the batteries in the opposite order in which you connected them.

Check out this video to see how it’s done:

It is essential that you disconnect the lawnmower from the car as soon as possible rather than leaving them connected for longer than needed since this could overcharge the battery and result in an accident.

What to Do if Your Battery Won’t Charge

If you find that your battery will not jump or charge, chances are you can still bring it back to life. Check out this website if you want to learn how!

Live Demonstration Jump Starting Lawn Mower with the AVAPOW Car Jump Starter Battery Pack

In Summary

Charging your mower’s battery using a car battery charger is possible as long as your battery is in good shape and is 12-volts. A battery charger will make the process much more straightforward and safer for you since it is specifically designed to revive batteries.

If you do not have a car battery charger on hand, but a pair of jumper cables are available, then there is an alternative charge method that is just as efficient, which is using your car’s battery.

However, this solution only works to give your mower enough power to start up and drive it to a desired spot in the yard. It is not intended to provide your battery with a full charge, and doing so repeatedly could cause your battery to wear down faster.

Hi! I’m Peter, the owner of BackyardGadget. Working around the house has always been a big part of my life. I’ve created this site to share my experience, and to help people choose the right tools for the job. Thank you for stopping by!

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Can You Jump a Lawn Mower Battery with a Car? Easy Step-by-Step Guide 2022

You’re back from a long winter and want to mow the lawn, unfortunately, the battery won’t start the mower, and you need to do it as soon as possible, what can you do?

can you jump a lawn mower battery with a car to save yourself the time and money of obtaining a new battery or a new lawn mower? This Lawn Advisors article shall answer you in detail.

In this guide on Lawn Advisors, I’ll explain how batteries work inside the lawn mowers, what to check before trying to jump the lawn mower battery, and the main safety precautions you’ll need to adhere to, to preserve your health, and your car’s mowers.

We know that a flat battery can be annoying, but if you’ve already heard enough complaints about it, we’re here to fix the matter for you.

So, can you jump a lawn mower battery with a car? Yes. But how to do that is way more important than knowing if you can do it. This Lawn Advisors guide will provide you with a step-by-step detailed method.

Understanding the Issue

The Lawnmowers battery is mainly responsible for starting the engine alongside some battery-reliant devices inside the mower.


If the engine starts successfully, then the power required to run the electrical systems is produced by the alternator, powering the battery along the way too.

In other words, Batteries can provide, store, and receive electrical power once installed inside the lawn mower.

Since most mowers use 12-volt batteries, then our whole guide is made specifically for those mowers.

12V batteries are manufactured with 6 cells, each cell produces ~2.1V, amounting to ~12.6V, but it’s generally referred to as 12V worldwide.

Where can you find the battery? It depends on the mower’s model, but generally speaking, it can be found under the drink holder, behind the wheel, under the hood, or under the mower’s seat.

If this battery fails to start for the lack of power, then you’ll need to either refill, repair, replace, or jump the battery.

Can You Jump a Lawn Mower Battery with a Car? Safety Precautions

The process of jumping a lawn mower battery with a car can be both simple and complicated, it’s on you to make it the first not the latter.

Abiding by safety precautions will always make it easier, simpler, and most importantly: safe for you, the mower, and the car.

Before you start, read your mower manual for specific instructions regarding jumping the mower’s battery, as some manufacturers call against jumping the battery at all in some cases.

you may want to hold off on doing this until the environment/weather is better suited for this type of procedure, so make sure you’re in the suitable circumstances.

Now, keep in mind that you’re not dealing with a single device, you’re dealing now with a battery, a lawn mower, a car, and another battery.

Those are the main safety precautions we advise you to adhere to beforehand:

  • Wear protective professional gloves goggles.
  • Purchase a good-quality set of booster cables.
  • Position yourself carefully around batteries, don’t stand too close or too far from them.
  • The car’s engine should ALWAYS be turned off until the cables are connected properly.
charge, lawn, mower, battery, charger, jump

How to Jump Lawn Mower Battery with a Car? Step-by-Step Procedure

You’re all set now, the car is near the lawn mower, booster cables are ready, you’re wearing protective goggles gloves, and both batteries’’ terminals are exposed.

Start the process carefully, following the step-by-step list of procedures as followed:

  • Connect the Red (positive) cable to the mower battery’s terminal.
  • Connect the other end of the Red (positive) cable to the car battery’s terminal.
  • Connect the Black (negative) cable to the car battery’s (-) terminal.
  • Don’t connect the Black (negative) cable to the battery’s (-) terminal, it’ll damage both batteries.
  • Connect Black (negative) cable to the lawn mower’s metal frame instead, away from any batteries, cables, or gas tank.
  • Start the car’s engine for a couple of minutes to recharge the mower’s battery.
  • Kickstart the lawn mower; it should start properly.
  • After the lawn mower kick starts, you’ll need to remove the cables in reverse order, starting with the Black (negative) cable connected to the lawn mower’s metal frame, and finishing with the Red (positive) cable connected to the mower battery’s terminal.

Bear in mind that if the lawn mower doesn’t successfully start after carrying out the step-by-step procedure properly, then you’ll need to visit a technician to solve the mystery.


This concludes Lawn Advisors guide on Can You Jump a Lawn Mower Battery with a Car, as the answer is yes, but you’ll have to be as careful as you can during the whole process.

Safety precautions are as important as knowing the step-by-step procedures, that’s why you should understand them as well as the jumping operations.

In case you have any questions, feel free to leave them in the Комментарии и мнения владельцев section below.

Can You Jump Start A Riding Lawn Mower With A Car?

Riding lawn mowers are so convenient to use. Because they have larger engines with wider mowing decks, they cut lawns more quickly than the equivalent push or self-propelled lawnmowers are capable of. A riding lawnmower is an excellent investment if you have a large property with a sizeable yard.

You can jump-start most riding lawnmowers with a car if you follow basic precautions and the car’s electrical system is in good order. A vehicle will have enough power to jump-start the riding lawnmower if you sufficiently prepare both the jumper leads and the batteries.

If riding lawnmowers break down, they are much harder to move around and transport to a lawnmower technician; this means that lawnmower owners should become familiar with the bits that make the lawnmower work and carry out minor repairs. (Check out post how much does riding lawnmower weight.)

A flat battery falls into the category, and you should efficiently resolve this problem.

How Do You Safely Jump Start A Lawnmower?

If the lawnmower’s starter motor does not turn over fast enough when you turn the ignition key on, or if there is a clicking sound, the lawnmower’s battery may not have enough charge, and the lawnmower won’t start.

There are three possible solutions to correct the situation which are.

Solution 1 – Attach The Battery To A Charger

If you are willing to postpone mowing the lawn, a battery charger is the best solution.

Battery chargers are more efficient than a lawnmower’s charging system.

Most riding lawn mowers use an alternator to charge the battery. Most battery chargers generally have a better performance than a riding lawnmowers alternator because they usually have a ‘refresh’ mode which ensures optimum performance and life.

The higher the amps the battery charger produces the “deeper” the charge and the quicker the battery charges.

You have two options if you need the lawnmower to be started immediately.

Solution 2 – Attach A Battery Pack

A stand-alone battery pack offers some advantages compared to jumping your riding lawnmower from a car.

Battery packs are portable devices that hold sufficient charge to start a lawnmower with a flat battery.

They weigh very little and can supply up to 900 amps to enable a recalcitrant battery to start the riding lawnmower.

They Are Safer For The Electrical System

Most portable battery packs have a polarity protection feature.

If the user crosses the polarity (connects the positive terminal to the negative and vis-versa ), the battery pack will warn the user and cut the connection until the cables are changed over.

Connecting the leads backward can cause significant damage to both the car and lawnmower electrical systems.

Battery Packs Are Safer For Users

While jumper cable clamps tend to spark, battery packs don’t deliver power until a proper connection is established.

By eliminating sparks, there is a lower possibility of an explosion of the hydrogen gas, which may have leaked from the lead-acid battery.

You Can Use Battery Packs For Than One Purpose

In addition to the jump-starting capability, many battery packs also come equipped with DC power sockets, USB charging sockets, air compressors, or emergency lighting.

expensive units include an inverter and convert the current to run devices that need AC.

Solution 3 – Jumping The Riding Lawnmower From A Car

If there is no battery pack available and both the lawnmower and the motor vehicle electrical systems are rated at 12 volts, you can use a car to jump start the riding lawnmower.

Follow the steps listed below to jump the lawnmower from the car safely.

charge, lawn, mower, battery, charger, jump

Step 1 – Access The Riding Lawnmower Battery

Open or lift the hood, which covers the riding lawnmowers battery. In many instances, this is situated under the operator’s seat.

If the battery terminals are corroded, 1) disconnect the riding lawnmower cables; 2) Mix a spoon of baking soda into a cup of tepid water; 3) Use the mixture to scrub off all the corrosion.

Check the battery voltage is 12 volts and not 6 volts. If the riding lawnmower is a very old model, the battery voltage could be 6 volts. In this instance, you cant jump the lawnmower battery from the car.

Step 2 – Connect Both Batteries

Connect the positive (red) cable to the corresponding terminal on the car’s battery. It is essential that you FIRST connect the positive lead to both batteries.

The positive cable has red insulation or a red battery clamp and may be marked with the word “POS” or have a plus sign.

Connect this cable to the corresponding terminal on the riding lawnmower’s battery.

charge, lawn, mower, battery, charger, jump

It doesn’t matter whether you connect the car’s battery or the lawnmower battery first.

After you connect the positive cable to both batteries, connect one end of the negative wire to the remaining terminal of the car’s battery.

The negative cable has black insulation or a black battery clamp and may be marked with a “NEG” or a minus (-) sign.

Connect the negative cable to a shiny clean metal surface on the lawnmower. If possible, don’t connect the negative cable directly to the negative terminal on the battery, as it may spark, igniting hydrogen gas that could be leaking.

Step 3 – Start The Lawnmowers Engine

If the car’s battery has an insufficient charge to start the lawnmower, try starting the car’s engine first.

The car’s charging system will generate more power, and the lawnmower may run on a second try.

If successful, let it run for two minutes and then disconnect the jumper cables in the reverse order to how you connected them.

Why Did The Battery Go Flat?

Although by now you may have started the lawnmower and are happily cutting the lawn, it is worthwhile trying to find out the reason the riding lawnmower battery lost its charge in the first place.

The following are some common reasons a lawnmower battery may lose its charge.

There Is A Problem With The Lawnmowers Charging System

Check that the alternator is in good working order and all the components appear in good condition.

Lawnmowers are designed to be operated at full power. The alternator will only produce sufficient charge if the engine speed is adequate.

Even a 10% reduction in engine speed will prevent charging the battery. If you suspect the engine is not producing sufficient revs, arrange for it to be serviced.

The Battery Is In Bad Condition

Batteries age and, over time, need to be replaced. If your battery takes more than eight hours to charge with a battery charger, it is probably damaged and needs to be replaced.

The Batteries Terminals Have Corroded

The presence of corrosion doesn’t automatically mean that the battery needs to be replaced, but if corrosion is evident, you should find out the reason.

If the battery cables are not tightly fastened, a more significant load is imposed on the battery, which will cause it to drain more quickly.

The Riding Lawnmowers Electrical System Is Discharging The Battery

Check all the lawnmowers wiring for breaks in the insulation. The battery may be discharged because a short circuit is caused by damaged wiring.

Check the electrical consumers (lights, horns, etc.) do not have damaged circuitry or switches that are not disconnecting the circuits.


If your riding lawn mower battery is not sufficiently charged to start the engine, it is possible to use your car’s battery to jump-start the lawnmower engine.

Ideally, it is more efficient and safer first to charge the lawnmower battery or use a battery pack to start the mower.


Jason is an expert writer and is passionate about Smart Homes and Home Improvements writing as well as lifestyle and Lawn Care. He spent the past twelve years living in Hawaii, where he worked closely alongside event planners and resort owners to perfect his knowledge of luxury products and aesthetics. He discovered his passion for DIY projects and home improvement there. Currently, he lives in Washington D.C with his family and 2 pets. View all posts

Will a Lawn Mower Run With a Dead Battery? Find Out Now!

Most people love seeing a perfect lawn, but mowing it themselves? They’d rather choose a more difficult chore. But then, how do you keep the grasses fine and green on your side?

The good thing about using lawn mowers is this: you don’t have to expend so much energy. Just by going back and forth, your lawn’s beauty is restored. But what happens when the battery dies? Will a lawn mower run with a dead battery?

When you rely on a lawn mower to keep your grass trimmed and tidy, a dead battery can throw a wrench in your plans.

Well, in this article, you will learn more about your lawnmower, its battery, and what to do when the battery dies.

Starting with the first question on your mind:

Will a Lawn Mower Run With a Dead Battery?

The answer could be a yes or a no. A yes because there are different kinds of lawnmowers in the market, and some may function somehow with a dead battery. It’s a no because your lawnmower may be one of those that need a battery to function.

But unfortunately, it seems more people have these kinds of lawn mowers that solely need a battery to work anyway.

Some mowers, like riding lawn mowers, need a battery to start the engine. This means that if the battery of the riding lawn mower dies, you would not be able to start the equipment, let alone use it to trim lawns.

The battery of a riding lawnmower charges the spark plug, starting the engine. So if the battery runs dead, it can’t start until you charge the battery or devise another means to start the machine.

Most modern lawnmowers only come with a battery that needs frequent charge. So if the battery dies, you can’t use them because jump-starting the mower won’t work.

Starting a Lawnmower with a Dead Battery

If you own a riding lawnmower with a dead battery, you may still be able to use it for a while. One way to power a lawnmower without using its battery directly is by jump-starting it. You can use similar lead batteries like the car battery to start it.

These lawnmowers are designed to function like car engines, which is why the car battery works as a good option.

You jump-start the lawnmower by connecting the battery to a car battery using jumper cables. That way, the battery generates enough energy from the car battery. Before you use your car battery as source of energy, you must ensure the battery is at fault and not some other component of the lawnmower.

Nevertheless, the best bet is to recharge the battery using a good charger. But it would be best if you had a new battery where your battery is faulty and old.

Steps to Charge a Riding Lawn Mower

The steps to charge the riding lawn mower include:

  • First, switch off all connections to electricity before you begin. Ensure you dress safe too.
  • Get a good pair of charging cables.
  • Connect the cable to the battery of the lawnmower. Connect the red positive point to the positive terminal first, then the negative to the negative terminal of the mower’s battery.
  • Make sure the voltage settings match the voltage power of your lawnmower. You can alter the settings yourself.
  • Plug the charger into the electrical outlet and wait for the battery to charge for a while.

As additional information, the car battery charging procedure will only work if your lawnmower uses a 12-volt system compatible with the battery. If the equipment uses less, it will damage the battery. So using a charger with a verified current is the best way to go about charging.

The battery charger you use may come in different amps, and sometimes, it may not affect the battery. The current difference only lengthens or shortens the charging time.

Will an Electric Lawn Mower Run with a Dead Battery?

Before you go on to replace the battery, regardless of the lawnmower you are using, verify the origin of the problem to conclude the battery is at fault. This is important because sometimes, the fault may not be from the battery.

Modern lawn mowers come with lithium batteries as those laptops and phones use. So, just like you need to charge your phone when the battery dies, treat this group of lawn mowers the same way if you own one.

If the battery of a wireless electric lawnmower dies, connect it to electricity to charge. Usually, charging these lawnmowers wouldn’t take more than three to four hours, though they last for fewer hours than diesel-powered ones.

Sometimes, however, you may need to change the lawnmower’s battery completely. You can get good batteries for your lawnmowers from the store where you got the machine or directly from the manufacturers.


So will a lawn mower run with a dead battery? Now, you know the answer depends on the kind of lawn mower you have.

Though issues with lawnmowers can arise for different reasons, it may just be quick to fix if what you are dealing with is a dead battery.

Kickstarting the lawnmower with a car battery may temporarily solve the problem, but never make using the car battery a norm.

Always remember to match the voltage of the lawnmower battery to the charger or the car battery if you are jump-starting it. You don’t want to risk losing the battery or the lawn mower because you didn’t do something right. If you are not skilled in handling these machines, get someone who understands how they work to help out.

Frequently Asked Questions

Can I charge a lawnmower battery with a Car charger?

You can charge your lawnmower’s battery using the regular car charger. You will follow the same process of connecting it with a standard charger. It would help if you also had the jumper cables, which on most occasions, are connected to the charger.

Attach the positive terminal to the positive side of the cable and the negative terminal to the negative side of the cable.

However, you must know this is possible if the lawnmower is 12V, as the car charger is only compatible with 12v batteries.

Why does my lawnmower battery die without me using it?

Like every device powered by batteries, your lawnmower battery can die too. However, the battery dies when you are not using them because of the cold weather.

Most lawnmowers have lead batteries. Cold temperature affects these lead batteries negatively, as the batteries slowly drain during cold temperatures, even if you keep the machine well.

So if your lawnmower suddenly develops faults when you want to use them though you changed them recently, the extreme cold might be the leading cause.

How do I prevent my battery from dying?

Keep your lawnmower in an area of your house where it won’t be affected much by the cold. You can also try to service the equipment during winter to keep the battery alive and ready for when you need them.

Doing this recharges the battery and also prevents the battery from complete damage, saving you the cost of replacement batteries.

Sometimes, you may need to take out the batteries and keep them in a warmer place to preserve them for a longer time. However, never try to handle these lead batteries yourself, as lead is poisonous to one’s health.

Hey, I’m Lisa and I’ve been an avid gardener for over 30 years. I love writing, talking and living in the garden! Feel free to connect with me on my socials below