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

The need of a battery to start and run a riding lawnmower is one of the few similarities between riding lawnmowers and regular automobiles. Therefore, can you and should you use a car battery charger to charge a lawnmower when there is only one available nearby and it has a dead battery?

Can a car charger be used to charge a lawnmower battery? Yes, you can use a car battery charger to charge a battery in your lawnmower; just use the jumper wires that are already attached to the charger to connect the mower’s battery to the charger. This method, though, is limited to 12-volt batteries.

You may do this process within the limits of your own house without the assistance of a professional. To prevent damaging your lawnmower or your surroundings, you must, however, take a few precautions.

Why Do Lawn Mowers Run Out Of Battery?

Charge Lawn Mower Battery Car Charger

Battery life eventually runs out for everything. However, a lot of cars and lawnmowers have a system in place that will maintain recharging the battery as long as it is functioning and utilize fuel to function. This raises the question: Why did my battery die while I wasn’t even running the mower?

The typical reply to this question is wintry weather. Lead batteries, which are used in lawn mowers, are known to slowly drain in cold weather. Therefore, if you are experiencing this issue in the spring, it was most likely the winter’s cold temperatures that were to blame, and this is very common.

Do not hesitate to call a professional if your battery is damaged or you believe that your lawnmower may have a problem other than the battery; handling lead batteries can be hazardous.

Preventing Battery Drainage

You may put your lawnmower somewhere where it won’t get as cold over the winter, which would help prevent your battery from draining. Additionally, you may sometimes turn it on throughout the winter to allow the battery to recharge.

Also read: Can You Use Car Engine Oil in a Lawn Mower? (Explained)

But since you are probably reading this page because your battery has already been discharged and you want to know how to recharge it with your car battery, let’s get right to it.

Dangers Of Using A Car Charger To Charge A Mower Battery

While a car may be used to jump start a riding mower’s dead battery, this isn’t something that should be done frequently. Jump-starting a battery involves delivering a lot of power and putting extra pressure on its interior parts.

The more frequently you do this, the faster your battery’s performance will decline.

You can also use a 12 Volt, 200 CCA Battery for your lawn mower.

Given that it is too much power for the mower’s electrical system to manage, it may also cause the diode to fail. Additionally, keep in mind that using the car’s battery to recharge the mower’s battery drains it, meaning you could eventually need to jump-start the vehicle!

The Advantages Of a Battery Charger

In order to top off the battery through trickle charging, a battery charger connects with the target battery. When the charge level reaches a particular threshold, the input current is decreased. This keeps the battery from overheating and releasing chemicals that limit its lifespan and harm the battery cells. A battery charger also regulates the input current during the first bulk charge, preventing overcharging and overheating of the target battery. When you connect your riding mower battery to your vehicle battery, you lose both of these benefits, and the consequences might be severe.

If you keep the car running while the batteries are connected, the risk of overheating and damaging the mower battery increases. The output of the car’s alternator is more than that of the mower, therefore you should switch it off. However, if you leave the car running while charging the mower battery, you risk simply draining the car battery and maybe needing to jump-start the car.

Jump-Start The Mower If You Don’t Have A Charger

As long as the riding mower’s battery is a 12-volt one, it is okay to jump a riding mower battery from a car battery. Simply keep the mower running for an hour or two after starting it; the alternator, which serves as a battery charger, will take care of the rest. Ideally, you should start the mower soon before performing a significant amount of mowing. The battery should be roughly charged when the task is finished. Here’s how to jump start a lawn mower:

Step 1:

Positioning the car behind the mower will put you closer to it than if you parked in front of it since the mower battery is typically underneath the seat.

Step 2:

Open the mower’s battery compartment and remove any obstructions by opening the compartment. In both cars, remove the plastic covers from the battery terminals.

Step 3:

Connect the cables in this order:

  • The red lead attached to the mower battery’s positive terminal.
  • The opposite end of the red lead that connects to the car battery’s positive terminal.
  • The negative terminal’s black lead on the car battery.
  • The black cable’s other end connected to a metal object that was clearly visible on the mower’s body.

Step 4:

Prior to doing this, do not start the car. It is okay to keep the batteries attached for a minute or two to partially revive the dead battery if the mower won’t start, then try again. Once the mower has started, unplug the connections in the opposite direction from how you attached them.

Using A Portable Jump-Starter

Connect the red clip to the mower’s positive terminal and the black clip to the mower’s negative terminal or to the metal frame when using a portable power supply to jump-start the machine. When connecting the connections, make sure the power pack is turned off. After that, turn it on and start the mower. Turn off the power supply as soon as the mower begins, then unplug the wires starting with the black one.

Frequently Asked Questions

If The Jumpstarting Doesn’t Work, What To Do?

If the lawnmower won’t start after being jumpstarted, dies shortly after the cords are disconnected, or won’t start after being turned off, the battery may be dead. A lawn mower’s battery typically lasts three years before needing to be recharged.

The voltage regulator or alternator may be faulty if the mower starts, runs for a short time, and then stops. If this occurs, you must check the alternator and all of the voltage. It must be checked by a specialist, or you must get a new one.

How To Keep A Mower’s Battery From Dying?

Some individuals store their lawnmowers during the whole winter. The battery begins to deplete if it is not being used. Although it is not typical, you will discover that your mower’s battery has to be charged every season. Some individuals remove the batteries from their lawnmower and leave it in their business. There is another, superior method. When left alone, a floating charger keeps the battery completely charged. It is the easiest method. The battery must be linked to the clamps, and it must remain connected all winter. Your battery won’t run out because of it.

Is There Any Other Way To Jumpstart A Lawnmower?

Some individuals are apprehensive about using a car’s battery to restart their lawnmower’s battery. If you’re worried as well, then try some different approaches. If you have a spare car battery, you can utilize it. Simply connect it to the mower’s battery in the manner described above. Try to start the mower once it has been hooked. If it works, that’s great for you, but if you don’t, the battery won’t hold a charge.

However, there is one other method for jumpstarting the mower. You will need to push your mower to a suitable incline in this situation. This technique makes use of the clutch. Set the parking brake and drive to the very top. Start the car’s engine. By depressing the clutch, the lowest gear is selected. Release the brake and engage the clutch. The mower will roll down, as you will see. When it reaches its maximum speed, let off the clutch. The lawn mower will start in this way.

In Summary

As long as your battery is in excellent condition and is 12 volts, you may charge the battery in your mower using a car battery charger. Since a battery charger is made expressly to revive batteries, it will make the procedure lot simpler and safer for you.

Using your car’s battery is a different charging option that is just as effective if you do not have a car battery charger on hand but do have a set of jumper cables.

The mower will only have enough power from this option to start up and move to the desired location in the yard. It is not meant to fully charge your battery, and attempting to do so repeatedly may cause your battery to degrade more quickly.