Lawn Mower Battery Size Chart

Lawn Mower Battery Size Chart

The lawn mower battery size chart below will help you select the right battery for your lawn mower. Lawn mower batteries are available in many different size options; not just one size fits all. It’s important to understand what type of lawn mower you have before buying a new battery.

Battery Size

Battery size is measured in cold cranking amps, or CCA. A battery’s CCA is a measure of its ability to start the engine of a vehicle at extremely low temperatures (-30F/-34C or colder). The higher the CCA rating, the better chance your lawn mower will have starting up when you need it most (when it’s super cold out).

The final thing to remember about batteries is that they come in different types: wet cell (or flooded) and sealed maintenance free (or maintenance-free). Wet cell batteries are more common and also less expensive than their sealed counterparts; however, they require periodic maintenance by adding water over time. Sealed batteries do not require any maintenance but tend to cost more than wet cell versions due to their construction process and design features.

Charging Current

The charging current is the amount of amperage going into the battery. Charging current is measured in amps, but it’s also expressed by some manufacturers in CCA (cold cranking amps) or amperes. A battery with a large charging rate will accept more energy than one with a small charging rate, even if their voltage ratings are identical.

Charging current is usually expressed in amp-hours, which can be found by multiplying volts times amps together for each cell in your battery pack:

2V x 3A = 6Ah

Cranking Amps

The cranking amps, or CA, is a measure of how much current the battery can deliver for 30 seconds at 32 degrees Fahrenheit. This number is important when you’re trying to start your lawn mower in cold weather (since the engine draws more power from the battery), but it’s not something you need to worry about if your mower starts up just fine.

AH Capacity

The AH capacity of a battery is a measure of how much energy the battery can hold. It’s also a measure of how long the battery will last. The higher the AH capacity, the more energy the battery can hold and thus, the longer it will last. If you want your lawn mower to work for more than an hour, get a high-capacity battery for it.

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Weight (lbs)

How much the battery weighs is a big factor, especially if you’re replacing a smaller battery with a bigger one. That’s because the weight of the mower may be already at or near its max capacity for your terrain and grass type (see “Grass Type and Mowing Conditions,” below). So if you replace your old battery with one that weighs more than 5 pounds heavier, it might not be able to handle all of those extra pounds, which will cause it to shut down while in use.

To help you find an appropriate replacement for your current mower, we took measurements from both our high-end models and cheaper models to give you some idea of how much each type weighs. In general terms: The heavier it is (in lbs), the better quality it tends to be; however there are many exceptions here so make sure to check out our complete list before making any purchases!

Height (inches)

The first thing to keep in mind is that the height of the battery is measured from the bottom of the battery to the top of the battery. This measurement is important because it’s used to determine how much space you’ll need for storage as well as how high your tray needs to be. For example, if you have a 48″ deck mower, but want to store it in a shed that only has a 46″ ceiling height, then you’ll need an additional 2″ clearance on top and bottom of your batteries so they can fit inside without hitting anything else—and even then they may not fit!

The second thing to understand about this measurement is that it determines whether or not your batteries will work with your tractor or zero turn mower equipment (ZTM). If one type isn’t compatible with another, it won’t matter how many cubic inches are available: The only way around this problem would be by purchasing custom-made components from third-party manufacturers like Redback Technologies who specialize in such things!

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Length (inches)

The length of a battery is the distance from front to back. This measurement is often listed in inches, mm, cm and feet or yards.

A 14-inch long lawn mower battery will be almost 4″ longer than a 10-inch long lawn mower battery.

Depth (inches)

The depth of a battery is measured from the top of the battery to the bottom of the battery. This can be important if you are using a battery box or tray, because they may not fit certain batteries due to their varying depths.


The U1R battery is the most common size of battery used in lawn mowers. It’s also used in other equipment like tractors and motorcycles.

The U1R battery has a voltage of 18 volts, which means it can deliver more power than a 12V or 6V battery. This makes it ideal for smaller machines like lawn mowers because you’ll get better performance from your machine with a higher voltage battery.

6 to 8 amperes

In this section, you’ll find information about the ampere ratings of various lawn mower batteries. The ampere rating is a measure of how much current a battery can supply to your lawn mower. So if you have an 8-amp engine, and use an 8-amp battery, then all systems should be go!

However, when looking at the chart below remember that these numbers are generalizations based on average performance across different brands and models. The reality is that there are hundreds of different variables that can affect how well (or poorly) your particular lawnmower runs on a given battery size. That’s why it’s so important for you to read our reviews before making any purchasing decisions!

145-170 CCA for a 12 volt battery, 290-330 for a 24 volt battery

The cold cranking amps (CCA) rating is a measurement of the battery’s ability to deliver current. CCA is a good indicator of the battery’s ability to start a car or truck in cold weather, and it also indicates the amount of power that can be used from the battery before it needs recharging. The higher the CCA number, the more resistant your battery will be to discharge when you’re not using your vehicle for extended periods of time.

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Cars typically have 12 volt batteries, while trucks require 24 volt batteries due to their heavier loads and larger engines.

10-12 AH

The AH capacity is a measure of how long a battery can power a device. The higher the AH capacity, the longer your battery will last. This rating is usually measured in amp hours (AH). For example, a 10-12AH battery will last longer than an 8-10AH battery because it has more amp hours (12 vs 10). The higher the AH capacity, the higher the price for any given product.

10-17 and 15-32 for 24 volt batteries, respectively.

If your lawnmower uses a 24-volt battery, you will most likely need to purchase one of the following:

  • 10-17 for a 12 volt system
  • 15-32 for a 24 volt system

The capacity of the lawn mower batteries you need will vary based on what kind of mower you have.

Lawn Mower Batteries vs. Car Batteries (Battery Ratings & Advice)


The capacity of the lawn mower batteries you need will vary based on what kind of mower you have. The capacity of your battery will depend on the size of your engine, which is directly related to the size and weight of your mower. For example, if you have a small engine (less than 20 horsepower), a smaller battery may work for you. On the other hand, if you have an industrial grade riding lawnmower with a powerful engine, then larger battery packs are necessary to store enough energy for longer periods of use without recharging every few hours or days.

If you’re in need of new replacement batteries for your lawnmowers but aren’t sure how much storage capacity they require or where to find them online, take a look at our helpful guide below!

The capacity of the lawn mower batteries you need will vary based on what kind of mower you have.

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