Can you jump a lawn mower battery with a car battery?

Asked By: Gurjeet Fenlon | Last Updated: 2nd January, 2020
Category: home and garden home appliances
4.1/5 (789 Views . 36 Votes)
You can jump the mower with the battery in your car or with a portable jump-starter, but you can only use your car battery if your mower has a 12-volt battery. In addition, you can't use your portable jump-starter to jump a 6-volt battery if it doesn't have a 6-volt setting.

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Also to know is, can you jump a 6v battery with a 12v battery?

You can jumpstart a 6 volt with 12 volts, but the safe way to do it is with the key off. Use the 12 volt to impart a charge to the 6 volt battery and then disconnect it before you try to start the engine, otherwise you might fry your gauges and generator/alternator.

Also, can you use a car to charge a lawn mower battery? Assuming the battery is in good enough condition to accept a charge, you can use your car to get the mower going. The best way to charge the battery is to jump-start the mower and leave it running to allow the alternator to do the job.

One may also ask, can you put water in a lawn mower battery?

Use only distilled water in a battery. This prevents chemical reactions from household water with minerals from contaminating the battery. Tap water minerals reduce battery capacity to hold a charge and increase the self-discharge rate.

Can I jump start a dead battery?

If you're stuck with a dead battery, you can start the car by using jumper cables to connect the bad battery to a fully charged one, whether or not it's fitted to another vehicle. Here's a guide on how to jump start a car, assuming that the charged battery is fitted to another vehicle.

29 Related Question Answers Found

How do you check a lawn mower battery?

  1. Lift the seat on your riding lawn mower to access the battery.
  2. Turn on the digital multimeter and switch it to "DC" or "A" to test battery voltage.
  3. Grasp the leads above the finger guards on the probes, and place the red lead on the positive (+) post and the black lead on the negative (-) post on your battery.

Why does my riding lawn mower battery keep dying?

Lawn mower battery keeps dying
One or more cells in the battery may be dead. Try charging the battery with a battery charger. If the voltage regulator is defective, the battery won't receive enough voltage, causing the battery to drain quickly.

How does a riding mower charge the battery?

Most lawn tractors possess one of two types of charging systems to help keep the battery up and running. One type of charging system is the belt-driven alternator, typically mounted on the engine. As the belt turns the alternator, the alternator continually generates power to recharge the battery.

What is the best lawn mower battery?


The 12 Best Lawn Tractor Batteries
  • Mighty Max 12-volt 35Ah Tractor or Riding Mower Battery.
  • Husqvarna YTH 2448.
  • Casil 12-Volt 35Ah Tractor Riding and Mower Battery.
  • Neptune NT1234 Toro 106-8397 Replacement Battery.
  • UPG 90508011 12-Volt 18Ah Lawn Tractor Battery.
  • ExpertPower EXP1250.
  • Powerstar 106-8397 PS 12-3.3.
  • Mighty Max 12-Volt 35Ah Gel Battery.

What happens if you charge a 6 volt battery with a 12 volt charger?

So yes you take two like 6 volt batteries and charge them in series. Your charger will think it is charging one 12 volt battery. So take a wire and hook it to the positive terminal of the first battery and the negative terminal of the second.

What happens if you use a 12 volt battery on a 6 volt system?

You can install the 12v battery as positive ground in place of the 6 volt unit. Leave the lights and radio turned off while you have the 12 v battery installed. Yes, it will work, Starter will spin up quick. You'll need to use a Ballast Resistor to protect the Coil & Points.

How do you jumpstart a positive ground battery?

Re: How to Jump start with Positive Ground
  1. connect the cables directly to the battery on the car with the good battery, being certain not to allow the opposite ends to touch.
  2. connect the positive cable to the battery of the car with the bad battery.

How do you make a 12 volt battery into a 6 volt battery?


Wiring two 6-volt devices in series reduces the voltage from the battery by half so each device gets 6 volts. Cut one strip of AWG 18 gauge wire using a knife. It only needs to be about 12 inches long. You use this wire to connect between the 12-volt battery and the 6-volt light bulb to switch the power to 6 volts.

How do you jumpstart a 6 volt positive ground?

Re: 6 volt, positive ground boost help?
  1. Disconnect the lead from the starter to the starter solenoid at the starter solenoid.
  2. Connect the 12V vehicle Positive to the 6V vehicle Positive.
  3. Temporarily clamp the negative booster cable to the starter cable to rotate the engine. Unclamp it once the motor starts.

How do you charge a 6 volt battery?

How to Charge a 6V Battery
  1. Ascertain the chemical base of the 6-volt battery.
  2. Attach the battery cable clamp on the end of the red wire from the charger onto the "+" terminal of the battery and the cable clamp on the end of the black wire from the charger onto the "-" terminal of the battery, if your 6-volt battery is lead-acid.

Can I use jumper cables on a motorcycle?

Push starting, bump starting, or pop starting a car or motorcycle is a tried-and-true method of getting the engine running when the battery is dead or when the starter isn't working. You don't need jumper cables or any special tools, and in a motorcycle, you can easily do it on your own.

What happens if you overfill a battery?

What happens if you over fill the battery? If you put too much water is in the battery, when the car is started, the acid will spill. If there is too much water in the battery, the rising water level from the reaction will cause the water to overflow. This causes valuable acid inside the battery to be lost.

How do I know if my battery needs water?


While a battery should only be filled after it is completely charged, you should check the water level before charging. Before charging, make sure there is just enough water to cover any exposed plates. After charging, add enough water to bring the level to the bottom of the vent, about ¾ below the top of the cell.

How do you store a lawn mower battery for the winter?

Putting Your Lawn Mower to Rest for Winter
  1. It's a good idea to remove your lawn mower battery for the winter and store it in a cool, dry place. Be sure to store it away from gas cans, the water heater or furnace.
  2. Brush or hose off leaves, grass and mud from your mower.
  3. Store your mower in a dry, protected place such as your garage or a garden shed.

Can a completely dead battery be recharged?

A car battery is considered discharged when the voltage drops below 12 volts. While your vehicle's alternator can keep a healthy battery charged, it was never designed to completely recharge a dead car battery. These charging devices are designed to safely restore a dead battery to full charge.