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How Long Does It Take to Charge a Lawn Mower Battery?

Written by Edwin Jones / Fact checked by Andrew Wright

how long does it take to charge a lawn mower battery

Have you ever wondered why some lawn mower batteries take more than a day to charge while others require only a few hours? Typically, this is based on the battery charger’s amp rating. However, there are some other factors that can affect the charging rating.

As a lawn mower owner, understanding how long does it take to charge a lawn mower battery is vital for effective planning and maximizing productivity. Let us discuss this in more detail below.

How Long to Charge a Mower Battery?

If you were using a lawn mower, there may be a chance that you may find your lawn mower battery dead. For this reason, charging is our main solution.


When charging, you need to be careful about the battery charge lawn mower. It is important to don’t overcharge it as it can affect the battery’s lifespan. At the same time, having an insufficient charge may be why your lawn mower is not working properly.

While it is hard to predict the exact time for charging a riding mower battery or an electric lawn mower, here is a chart containing an estimated charging time for two types of lawn mower batteries at different amp ratings.

Battery Types and Capacity Estimated Charging Times
at 2 amps at 6 amp at 10 amps at 40 amps
6v 10 Ah 5 hours 1h 40 minutes 1 hour 15 minutes
12v 40 Ah 20 hours 6h 40 minutes 4 hours 1 hour

Factors Affecting Lawn Mower Battery Charging Time


  • Type of Battery

The type of battery used in the lawn mower can impact the charging time. It usually takes a shorter time to restore a lawn mower battery that is lithium-ion type than lead acid batteries.

  • Charger Amperage Rating

The amperage rating of the charger is another factor that affects the charging time of a lawn mower battery. A lawn mower battery charger with a higher amperage rating can deliver more current, resulting in faster charging.

A normal battery charger for a lawn mower usually takes an amperage rating of 2 to 10 amps or more for a fast charger. As a result, you can freely choose which charger can offer you a quicker charge based on your needs.

On the other hand, a trickle charger for lawn mower usually has an average amperage of 2 amps. While it offers a longer charging time, it provides a safe and reliable charging process.

  • Lawnmower Battery Voltage Rating

Lastly, the battery charging time can also be affected by lawn mower batteries voltage. Not only that, it is also essential for the safety of the charging process to prevent damage to the battery or cause any potential hazards.

So, what voltage is a lawn mower battery, 6 or 12 volt?

The same with amperage rating, higher voltage can also offer faster charging time. In this case, a 6-volt charger may double the charging time with a 12-volt charger. However, it’s important to check the specifications of your particular lawn mower battery to determine its specific voltage rating.

How to Charge Lawn Mower Battery

To charge a lawn mower battery:


  • Before starting, ensure you are in a well-ventilated area, wearing appropriate safety gear, and following any specific safety guidelines provided by the manufacturer.
  • Identify the location of the lawn mower battery. In most cases, it is located under the seat or hood of the mower.
  • Inspect the battery for any signs of damage, leaks, or corrosion. If you notice any issues or the lawn mower not charging the battery, it’s recommended to address them before proceeding.
  • Identify the positive (+) and negative (-) terminals on the battery. Attach the lawn mower charger: positive cable (usually red) to the positive terminal of the battery, and the negative cable (usually black) to the negative terminal. Ensure a secure connection but avoid overtightening.
  • After you recharge the mower battery, disconnect the charger from the battery terminals. Start by removing the negative cable, followed by the positive cable. Take care not to touch the terminals simultaneously or allow the cables to touch each other.
  • If you had to remove the battery from the lawn mower, carefully reinstall it in its original position, ensuring the positive and negative terminals are correctly aligned. Secure the battery in place according to the mower’s instructions.

Tips for Maximizing Battery Life and Performance

Here are some recommendations for cutting down charging time and making sure your lawn mower’s batteries are maintained correctly:


  • Check the voltage of your battery, then select a charger made for that voltage. As a result, compatibility and ideal charging efficiency are guaranteed.
  • Seek out chargers with a hookup failsafe feature to prevent faulty connections and guarantee secure and appropriate charging.
  • Choose a charger with an integrated charging timer to avoid overcharging and maintain a controlled charging process.
  • Choose a battery chargers for lawn tractors with a preset for adjustable amperage to shorten charging time based on your battery’s requirements.
  • If you have sufficient time for charging, think about utilizing a trickle charger. It offers a slow, secure charging procedure that reduces the possibility of battery damage.

Frequently Asked Questions


How Often Should I Charge My Lawn Mower Battery?

The frequency of charging a lawn mower battery depends on your usage. If you frequently use your lawn mower, you will likely need to charge the battery often. However, a weekly charge should be sufficient during winter when the mower is not in use.

How to Charge a Lawn Mower Battery Without a Charger?

Charging a lawn mower battery without a charger can be challenging. However, if a charger is unavailable, you may explore alternative options, such as using an inverter, solar panel, UPS inverter, or jump-starting the battery with a car.

Can You Start a Lawn Mower While Charging the Battery?

Yes. However, starting a lawnmower while charging a mower battery is not recommended. It can strain the charging system and potentially damage the battery or other electrical components.

How Long Do Lawn Mower Batteries Last?

On average, a well-maintained lawn mower battery can last 3 to 5 years. However, it is important to be aware that several factors, including usage and maintenance, may affect the battery life of a lawn mower.


Knowing how long does it take to charge a lawn mower battery is essential for keeping it ready whenever you need it to use.

However, it’s important to note that the charging time can be influenced by various factors that affect its overall duration. By understanding these factors and implementing proper charging practices, you can optimize the performance and longevity of your lawn mower battery.

For optimal charging outcomes, always remember to put safety first, pick the proper charger, and follow the manufacturer’s recommendations.

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