What Size Battery Does a Craftsman Riding Lawn Mower Take(Recommended)

When you own a Craftsman riding lawn mower, it’s crucial to understand the specifics of your equipment, including the type of battery it requires.

The right battery ensures smooth starts, consistent performance, and extended longevity of your mower.

But what size battery does a Craftsman riding lawn mower take? Let’s dig into the specifics so you can make the right choice and keep your machine running at its best.

What Size Battery Does a Craftsman Riding Lawn Mower Take

A Craftsman riding lawn mower typically uses a 12-volt Group U1 battery. These batteries are available in two variations: U1L (with the positive terminal on the left) and U1R (with the positive terminal on the right).

Craftsman mower battery size

The Cold Cranking Amps (CCA) rating for these batteries usually ranges from 150 to 300, providing enough power for starting the engine in various conditions. Always check your specific mower model’s manual to confirm the correct battery size and terminal orientation.

Battery Voltage

Voltage is one of the most critical factors when selecting a battery. Craftsman riding lawn mowers almost universally use 12-volt batteries.

A 12-volt battery provides the right amount of power needed for the starter to crank the engine. The consistency of power delivery is also vital for other electrical components of the mower, such as lights or any onboard electronics.

Most newer Craftsman models are designed with a 12V system in mind, so it’s essential not to use anything other than a 12-volt battery to avoid damaging your mower’s electrical system.

Older Craftsman mowers, however, may occasionally use different systems, so it’s always best to check the owner’s manual for confirmation.

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Battery Size (Group U1)

Riding lawn mower batteries are classified into different group sizes, which refer to the battery’s physical dimensions.

The standard size for a Craftsman riding lawn mower is the Group U1 battery. Within this category, there are two subtypes:

  • U1L: This version has the positive terminal on the left.
  • U1R: This version has the positive terminal on the right.
Battery Size for Craftsman mower

It’s important to check the placement of the positive terminal on your current battery to ensure you purchase the correct subtype.

Using the wrong subtype could result in the cables not fitting correctly or, worse, causing damage to the battery or mower.

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Battery Capacity (Cold Cranking Amps – CCA)

The cold cranking amps (CCA) rating is a measure of the battery’s ability to start the engine in cold temperatures. The higher the CCA rating, the more power the battery will have to crank the engine in cold weather.

For Craftsman riding mowers, most batteries have a CCA rating between 150 and 300. A battery with a higher CCA rating can be especially useful if you live in an area with cold winters, where engines can be harder to start due to the temperature.

Factors to Consider When Choosing a Battery for Your Craftsman Mower

1. Maintenance-Free vs. Conventional

Craftsman riding mower batteries are available in both maintenance-free and conventional (wet-cell) designs.

  • Maintenance-Free Batteries: These are sealed and don’t require you to check or add water. They tend to be more user-friendly and have become the go-to choice for most people. They’re convenient because you don’t need to worry about the liquid levels within the battery, which can help eliminate the chance of acid spills.
  • Conventional Batteries: These require periodic maintenance, such as topping off with distilled water to keep the electrolyte levels balanced. Some prefer conventional batteries because they tend to be less expensive upfront, but the trade-off is the added care they require.

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2. Battery Lifespan

Most batteries for Craftsman riding mowers last between 3 to 5 years, depending on usage and care. Ensuring the battery stays charged and is kept clean and dry will help to extend its lifespan.

Batteries left idle for long periods can discharge and lose capacity over time, so using a trickle charger during the off-season can help maintain battery life.

3. Compatibility

Always make sure the battery you’re purchasing is fully compatible with your Craftsman mower model. While the majority of Craftsman riding mowers use 12-volt U1 batteries, there can be variations in specific models. Checking your user manual or looking at the existing battery for details before making a purchase is key.

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4. Brand and Warranty

The brand of the battery can make a difference in its performance and durability. Choosing well-known brands specifically designed for lawnmowers is a good idea.

Many reputable brands offer one to two years warranties, which is important in case you run into issues with the battery.

How to Replace Craftsman Riding Lawn Mower Battery

  • Safety First: Start by ensuring the mower is turned off and remove the key from the ignition. Engage the parking brake and, if necessary, raise the mower’s seat to access the battery.
  • Disconnect the Battery: Using a wrench, start by disconnecting the negative terminal (black cable) before the positive terminal (red cable). This helps prevent any accidental shorts or sparks.
  • Remove the Old Battery: Carefully lift the battery out of the tray. Some models may have a strap or clamp holding the battery in place, which you will need to remove first.
  • Install the New Battery: Place the new battery into the tray, making sure it’s secured properly. Attach the positive cable first, followed by the negative cable. Ensure the connections are tight and free from corrosion.
  • Test the Mower: Once installed, turn on your mower to ensure the new battery is functioning properly. If everything works, close the seat and store any tools.

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Signs That Your Mower’s Battery Needs Replacement

  • Slow Engine Cranking: If your engine takes longer than usual to start or seems sluggish when turning over, the battery may not have enough power.
  • Dim Lights: For models equipped with lights, dim or flickering lights while the engine is off can indicate the battery is losing charge.
  • Corrosion: Visible corrosion on the terminals can inhibit electrical flow and may indicate that the battery is nearing the end of its life.

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Final Word

Choosing the right battery for your Craftsman riding lawn mower is essential for smooth operation and long-term performance. Most Craftsman mowers take a 12-volt U1 battery but always check your manual for specific recommendations. 

George Bill
George Bill

George Bill is a Mechanical Engineer by Profession and an avid gardener and has been mowing his lawn for over 20 years. He has used a variety of different mowers during this time.
George is an expert at maintaining his mowers and over the years, he has learned many tricks and techniques for getting the best results from his mowers and is always happy to share his knowledge on this site.