The Best Lawn Mower Battery – Reviews And Buying Guide

The best lawn mower battery should not only have a high capacity, but it also needs to have high durability, safety, and a suitable size. There are tons of lawnmower batteries on the market today. Hence, choosing a high-quality one is not a simple task.

We have tested many batteries before picking out the ExpertPower EXP1250 as the best lawn tractor battery in 2021. This product is built with the AGM (Absorbent Glass Mat) – a great technology that increases the battery’s durability.

Compared to other products, the ExpertPower EXP1250 is more versatile, more efficient, and more durable.

Top 7 Best Lawn Mower Batteries

ExpertPower EXP1250 – Best For Wide Variety Of Applications

This ExpertPower EXP1250 is the best riding lawn mower battery in 2021. It beats other models due to the wide variety of applications.

You can connect this battery to multiple electronic devices on your mower or in your home electrical system, including alarms, radio, speakers, lamps, emergency lighting, UPS system, Ion Block Rockers, and so on.

There should be no worry about the safety in use. The external case of this product is constructed of hardened ABS plastic to prevent spilling and leakage every time the battery endures physical impact.

What turns the product down is the battery lifespan, however. After a couple of years, this battery may not hold the charge anymore.

What we like:

• Wide range of applications
• Durable ABS plastic construction
• Absorbed Glass Mat (AGM) Technology
• Easy installation

What can be improved:

• Low battery life

Weize LFP 1235/ TL 1235 SLA Deep Cycle – Best For Durability

This deep cycle product is appealing due to its AGM (Absorbent Glass Mat) technology. This design allows the SLA battery to withstand heat in enclosed and indoor environments and supply good power without leaking the electricity.

The manufacturers have constructed the deep cycle battery with an anti-overheat cover. With this equipment, the battery lifespan will extend longer, for many more years.

The deep cycle battery comes from 2 different batches – TL1235 and LFP1235. Unfortunately, you won’t choose a specific model, as the manufacturer randomly packages the battery.

What we like:

• AGM technology for safe usage in enclosed and indoor environment
• Preventing overheat
• Extended battery lifespan
• Screws for installation included

What can be improved:

• The battery model comes randomly.
• Wire harness for mounting not included

Mighty Max Battery 4330198213 – Best For Easy Installation

Installing this Mighty Max battery is just a piece of cake. You need less than 10 minutes to connect this power source to your mower.

While other power tools have limitations for mounting positions, this battery can be mounted from any direction. The terminals stay on 2 sides for the convenience of installation.

This power source has been designed to resist shocks and vibration. No matter how you drive the mower, the battery will always stay stable in its place.

Unfortunately, the package only includes the battery and screws. You need to buy the wire harness and mounting accessories separately.

What we like:

• Deep discharge recover
• Mounting in any position
• Shock and vibration resistance
• High discharge rate

What can be improved:

• No mounting items included, except screws
• Low lifespan

Universal Power Group UPG UBCD5745 – Best For Leakage Prevention

You don’t have to worry about any leakage when using this Universal Power Group UPG UBCD5745.

With sturdy construction, this sealed lead acid battery can resist heat, chemicals, and vibration. It is almost impossible to break and leak electricity under physical impact.

Like many other models, this power source features an Absorbed Glass Mat (AGM). This technology prevents the battery from spilling and leaking, even when it works in an enclosed environment.

Unfortunately, we have to give a minus point to the lifespan of this product. As the manufacturer says, you need to replace this battery after every 3 – 5 years.

What we like:

• Heat, chemical, vibration resistance
• Absorbed Glass Mat technology
• High compatibility
• Lightweight

What can be improved:

• Low lifespan
• Charging in a sealed container is not allowed

Universal Power Group UPG-D5722 (KIT4-1) – Best For Safety In Use

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The Universal Power Group UPG-D5722 (KIT4-1) has attracted many customers due to its spill-proof construction.

This rechargeable battery can be mounted in all positions in your mower. Regardless of shocks and vibrations, it will not break or leak the electricity out.

As you can see, most modern batteries feature AGM (Absorbent Glass Mat) technology for safe operation in an enclosed environment. Of course, this UPG-D5722 (KIT4-1) is not an exception.

Please don’t disassemble or unseal this spill-proof battery. The chemical content inside the battery may explode when it is not sealed.

What we like:

• Shock and vibration prevention
• AGM technology for safe operation
• Spill-proof battery construction
• Handle for easy transportation

What can be improved:

• Risks of explosion when the battery is unsealed
• Low battery lifespan

Powerstar CP1232 – Best For Reliable And Improved Performances

This Powerstar CP1232 is highly reliable. It can work for an extended period without any maintenance.

This power supply can provide energy continuously without any loss of capacity or electrolytes. Also, it does not leak or spill, regardless of the mounting positions.

There is no need to maintain this battery. This spill-proof battery can withstand overcharge, over-discharge, vibration, and shock to remain durable for many years, thanks to the sturdy construction.

There is an important note for how to charge a lawnmower battery of the Powerstar. You should not charge the battery in a sealed container since it may get too hot and explode.

What we like:

• Sealed construction
• Absorptive mat separators for leakage prevention
• No maintenance practices required
• 2 years of warranty

What can be improved:

• Charging in a sealed container is not allowed.

Mighty Max Battery ML-U1-CCAHR – Best For Powerful Operation In A Wide Range Of Temperatures

It does not matter if the temperature is hot or cold, this Mighty Max Battery ML-U1-CCAHR can always work as a powerhouse.

This battery comes up with a high CCA (Cold Cranking Amps) rating of 320. It will help you start the engine of your mower quickly in cold weather.

Thanks to the quality AGM construction, the power source can remain durable in an enclosed or warm environment. There should be no worry about spilling and leakage.

It is quite bad that manufacturers don’t provide all the essential tools for installation. You will need to prepare the wire harness and mounting accessories by yourself.

What we like:

• High CCA of 320 for optimal engine starting in cold temperature
• AGM construction for powerful operating in an enclosed environment
• Leakage and spilling prevention
• High compatibility

What can be improved:

• Mounting up-side-down is not allowed.
• No mounting items included

Buying Guide for Best Lawn Mower Battery

Type Of Lawn Mower Batteries

Batteries come up in 2 main types, which are Lithium and Lead Acid. Different battery types have their unique advantages and disadvantages.

Lithium batteries

Lithium batteries, including LiFePO4 (Lithium Iron Phosphate), are very durable.

These power sources contain a BMS (Battery Management System), which prevents many issues, such as overcharge, overcurrent, over-discharge, short circuit, overheat, and many other unwanted accidents.

Lead Acid batteries

Lead Acid batteries (SLA batteries), however, are not as durable as Lithium. This battery type’s capacity tends to deteriorate shortly if it is discharged with high currents.

But when it comes to weight, Lead Acid batteries are a lot lighter than Lithium. You can use the SLA battery as a solution for weight savings. Most battery lawn mower drivers choose Lead Acid to reduce the weight that their vehicles have to carry.

On the other hand, Lithium costs more than its rival. If you are low on budget, the Lead Acid will be a great deal.

But as many people say, you get what you pay for. Lithium is more expensive, but it has a longer lifespan and requires less maintenance than Lead Acid.

Terminal Orientations

Different lawnmower batteries have different terminal positions. When buying, you may notice that there are 2 options: U1 and U1r.

The U1 battery has positive terminals on the left and negative terminals on the right. In contrast, the U1r battery features the positive terminals on the right and the negative ones on the left.

The difference in terminal orientations decides whether the battery fits your mower or not.

The terminal’s position should stay on the same side where you plug the battery cables into your mower. If you choose a battery with the wrong terminal orientation, the length of the mower cables may prevent it from fitting in your vehicle.

Cold Cranking Amps (CCA)

Batteries deliver weak current in cold weather, especially in freezing temperatures. In this case, you need to buy a battery with a high CCA rating.

CCA stands for Cold Cranking Amps. It signals the amount of current that a mower battery can transfer in cold conditions.

After construction, all manufacturers will stick a label on the battery, which describes the CCA rating. You want to check this factor carefully before buying.

Otherwise, you may not be able to start your mower in winter with a battery that has a low Cold Cranking Amps rating.

But too much of anything is also far from ideal. The higher the CAA is, the more expensive the battery will be.

In other words, a battery with too high of CAA will cost you more while you receive no additional benefits. Therefore, consider buying a product with a suitable amount.

Construction

Always buy a battery that has a sturdy construction! It is not only about the durability of the product but also about your safety!

If the battery is made of cheap and less durable material, it may easily break down. As a consequence, the electricity may leak out and cause dangerous incidents.

Batteries for mower are usually constructed with metal-plated submerged in the solution of sulfuric acid.

Most conventional batteries have a metal plate made of lead impregnated with antimony. These power sources usually lose charge after some time, even if left unused.

The reason is, the high content of plate antimony leads to corrosion in other battery components. As many parts of the battery lose their shape, they will not work correctly and cause discharge.

Nowadays, modern batteries have plates made of calcium.

This calcium material does not cause corrosion to other internal components in the battery compartment. That’s why you don’t have to worry about the battery self-discharging.

In addition, calcium garden batteries are much more durable. They are less prone to physical impact and vibration.

Voltage

The voltage decides the battery’s performance. Specifically, this factor describes the amount of current that flows in the power source in a fixed period.

Most tractors use a 12-volt lawn mower battery. If you have an electric mower constructed in the 80s, we recommend the 6 volts one.

The higher the voltage is, the greater the battery can perform. If you want your mower to operate powerfully, you can choose a lawnmower batteries voltage running from 36 – 40 volts.

Lifespan

Keep in mind that batteries downgrade over time, even when they are not used. Every battery will stop working or start causing issues after it reaches the limit of its lifespan.

Therefore, we advise you to buy a battery that is as new as possible. Many people tend to buy old batteries due to their low price. It is a common practice that we should give up.

Old batteries can and tend to cause issues, such as discharge, overcurrent, weak power, etc. Every battery is labeled with the manufacturer’s date. Please notice this factor before buying!

Battery Capacity (AH)

When fully charged, the battery can provide power to your mower for a duration. When the energy runs out, the battery will stop supplying electricity, and your vehicle will stop operating.

If you want to increase the running time of your mower, a battery with high capacity (AH) is required. AH stands for Amp hour, explaining the amount of amperage (ample power) a battery can supply for 60 minutes.

Reserve Capacity (RC)

When your mower’s engine is off, you can still use some electrical components of the vehicle, lamps or horns, for example. The electrical system will work until the voltage falls below the required minimum to run the vehicle.

In this case, the Reserve Capacity will tell how many minutes the battery can supply power to your mower’s electrical system without falling below the required voltage.

Of course, the higher the RC is, the better.

Warranty

Every battery comes along with a warranty. You want to check how long the warranty is effective.

With a warranty, you can fix your lawnmower battery or get replacement batteries for free whenever a technical issue occurs.

Usually, the manufacturers allow a warranty of 1-2 years. Most companies have a 30-day refund policy.

This video shows you how to replace a lawn mower battery:

Conclusion

As you can see from our review, the ExpertPower EXP1250 is no doubt the best lawn mower battery overall.

This product has sturdy spill-proof construction to remain durable for a long duration. Users don’t have to worry about spilling or leakage when using this battery.

Besides garden tractors, the Expert Power EXP1250 can provide energy to multiple electrical devices and electric vehicles. Not many 12-volt batteries can have high compatibility and make an excellent performance as this model can do.

Last update on 2024-06-07 / Affiliate links / Images from Amazon Product Advertising API