Keeping your Ryobi 40V mower running strong requires a reliable battery, and the market is filled with options from the original manufacturer and third-party alternatives. Choosing the right one can significantly impact your mowing efficiency, runtime, and overall lawn care experience. A high-capacity battery means less time waiting for a charge and more time achieving a pristine lawn.
This roundup simplifies your search by highlighting ten of the best replacement batteries for Ryobi mowers in 2025. We’ve compiled a selection that includes official Ryobi models for guaranteed compatibility and high-performing aftermarket options that often provide excellent value and extended runtimes for demanding yard work.
The Best Replacement Batteries for Your Ryobi Mower
- Bonadget 7000mAh Replacement for Ryobi 40V Battery 2PACK
- Ryobi 40V 4.0 Ah Lithium-Ion Battery OP4040
- 2Pack Upgraded 6.0Ah 40 Volt Batteries for Ryobi
- Koedsion 5.0Ah Replacement for Ryobi 40V Battery
- Ryobi 40-Volt Lithium-Ion 6.0 Ah High Capacity Battery
- 2Pack 40v 7500mAh Replacement for Ryobi 40V Battery
- RYOBI 40-Volt Lithium-Ion 2.6Ah Battery – (Bulk Packaged)
- 40V 3.0Ah OP4030 Replacement for Ryobi 40V Battery
- 1 Pack 10.0Ah Lithium-ion Replacement Batteries for Ryobi
- Ryobi 40V 2.4Ah Lithium-Ion Battery
Bonadget 7000mAh Replacement for Ryobi 40V Battery 2PACK
This two-pack from Bonadget offers a substantial power solution for users with multiple tools or large lawns. With an advanced 7000mAh (7.0Ah) capacity, these lithium-ion batteries provide extended runtime, allowing you to cover more ground on a single charge. They are certified by FCC, CE, and RoHS, ensuring they meet specific safety and environmental standards.
Built with user safety as a priority, these batteries include comprehensive protection against short-circuits, over-charging, over-discharging, and temperature extremes. They are designed as a direct replacement for a wide range of Ryobi 40V tools, including mowers, trimmers, and blowers. The pack of two is ideal for ensuring you always have a charged battery ready to go.
Ryobi 40V 4.0 Ah Lithium-Ion Battery OP4040
For those who prefer to stick with OEM products, the Ryobi OP4040 is a reliable and proven 4.0Ah battery. It offers a solid balance of runtime and weight, making it a practical choice for a variety of 40V cordless tools. Its compatibility is guaranteed across the Ryobi 40V ecosystem, providing peace of mind for tool owners.
This battery is engineered to weigh less and run longer than older NiCD battery technologies. It delivers consistent, fade-free power for the duration of its charge, making it a dependable option for standard lawn mowing sessions and other yard work.
2Pack Upgraded 6.0Ah 40 Volt Batteries for Ryobi
This two-pack of upgraded 6.0Ah batteries is designed to deliver performance that matches or exceeds the original equipment. With a 6000mAh capacity, they are built to last up to two times longer than standard batteries, which is a significant advantage for larger properties.
The batteries are fully compatible with Ryobi 40V power tools and chargers, offering a seamless user experience. They provide a longer runtime and more power, making them a solid solution for demanding jobs where extended operation is necessary.
Koedsion 5.0Ah Replacement for Ryobi 40V Battery
The Koedsion 5.0Ah battery is a mid-range capacity option that provides a good boost in runtime over standard models. As a lithium-ion replacement, it is designed for use with a wide array of Ryobi 40V tools, from lawn mowers and trimmers to blowers.
It features wide compatibility with numerous Ryobi tool and charger models, ensuring it integrates smoothly into your existing 40V system. This battery is a practical choice for users looking for a reliable aftermarket option that offers a bit more endurance than entry-level capacities.
Ryobi 40-Volt Lithium-Ion 6.0 Ah High Capacity Battery
As one of Ryobi’s highest capacity official batteries, this 6.0Ah model is built for users who need maximum runtime from their cordless tools. It is designed to work with all tools in the Ryobi 40V lithium-ion lineup, providing broad utility beyond just the mower.
The battery provides fade-free power, meaning it maintains consistent performance until it is depleted. This high-capacity option is ideal for tackling large lawns or for users who prefer to complete all their yard work without needing to recharge.
2Pack 40v 7500mAh Replacement for Ryobi 40V Battery
This two-pack boasts an impressive 7.5Ah (7500mAh) capacity, offering one of the longest runtimes available in the aftermarket space. With a wattage of 300Wh, it provides substantial power for the most demanding tasks, ensuring your mower has the energy it needs.
A convenient feature of this battery is the four LED indicators, which allow you to monitor the remaining power at a glance. This helps in planning your work and reduces the risk of unexpected downtime, as you’ll know precisely when a recharge is needed.
RYOBI 40-Volt Lithium-Ion 2.6Ah Battery – (Bulk Packaged)
The Ryobi 2.6Ah battery is a compact and lightweight OEM option, often sold in bulk packaging which can make it a cost-effective choice. Its smaller size and weight can be beneficial for use in less demanding tools or for users who prefer a lighter mower.
Despite its lower capacity, it still delivers the reliable, fade-free power characteristic of the Ryobi lithium-ion line. It’s a practical battery for smaller lawns or as a secondary backup battery for shorter tasks.
40V 3.0Ah OP4030 Replacement for Ryobi 40V Battery
This replacement battery claims to offer up to two times the runtime of a standard battery, thanks to its use of premium A-grade lithium-ion cells with a 3.0Ah capacity. It is an upgraded version designed for enhanced power and longevity.
It features wide compatibility with Ryobi 40V tools and chargers, and includes a built-in LED indicator to display the remaining power level. This allows for easy monitoring and helps prevent work interruptions by signaling when a charge is required.
1 Pack 10.0Ah Lithium-ion Replacement Batteries for Ryobi
For the ultimate in runtime, this 10.0Ah (10000mAh) battery is a powerhouse designed for the most extensive mowing sessions. Its massive capacity ensures that even the largest properties can be handled on a single charge, minimizing downtime.
This battery is built with safety as a core focus, featuring an integrated smart chip and multiple protection systems that guard against over-charging, over-discharging, and over-current. It has obtained FCC, CE, and RoHs certifications, confirming its adherence to safety standards.
Ryobi 40V 2.4Ah Lithium-Ion Battery
The Ryobi 40V 2.4Ah battery is an entry-level OEM option that provides a compact and affordable power source. Its smaller size makes it well-suited for lighter-duty tools or for users with smaller lawns that require less runtime.
As a genuine Ryobi product, it guarantees full compatibility and reliable performance within the 40V system. It’s a straightforward, no-fuss choice for basic power needs and serves as an excellent supplemental battery for shorter tasks.
Buying Guide: Picking the Right Replacement Battery for Your Ryobi Mower
So your Ryobi mower’s battery isn’t holding a charge like it used to, and you’re in the market for a new one. I’ve been there. Walking into a store or browsing online can be overwhelming with all the options, from official Ryobi packs to third-party alternatives. Let me break down what I look for when I need to get my mower running strong again.
First and most importantly, you need to match the voltage. This is non-negotiable. Using a battery with the wrong voltage can damage your mower and is a safety risk. Most Ryobi mowers use 40V batteries, but some older or smaller models might use 18V. Check the label on your old battery or your mower’s manual to be absolutely sure. Once you know the voltage, the next big number is Amp-hours (Ah). Think of voltage as the power, and Amp-hours as the fuel tank. A higher Ah rating means a longer runtime. If you have a large lawn, investing in a 4Ah, 5Ah, or even 6Ah battery means fewer interruptions to recharge. My medium-sized yard does just fine with a 4Ah, but your needs may vary.
Then comes the brand decision. Do you go with a genuine Ryobi battery or a third-party version? OEM (Original Equipment Manufacturer) batteries from Ryobi are guaranteed to be compatible and are often built to a higher standard. They usually come with a solid warranty, which gives me peace of mind. The trade-off is that they are typically more expensive. Third-party batteries can be a fantastic value. Many are built with high-quality cells and perform nearly identically to the OEM ones for a lower price. The key is to read reviews and buy from a reputable brand. I always check user feedback to see how a battery holds up over time.
You should also consider the battery chemistry. Modern Ryobi and most replacement batteries use Lithium-ion (Li-ion). They’re lighter, hold a charge longer when not in use, and don’t have the “memory effect” that older battery types suffered from. Stick with Li-ion for the best performance.
Finally, think about your other tools. If you own other Ryobi 40V tools, like a string trimmer or blower, a new battery is an investment in that entire ecosystem. A higher-capacity battery not only powers your mower longer but can also give your other tools a boost. When I’m comparing my final options for the 10 Best Replacement Batteries for Ryobi Mowers 2025, I weigh the price against the runtime, the warranty length, and the credibility of the seller. A few minutes of research now can save you from a disappointing season of mowing.
FAQ
Are third-party replacement batteries safe for my Ryobi mower?
Generally, yes, but you have to be selective. Reputable third-party manufacturers design their batteries to meet the same specifications as OEM ones. I look for brands with lots of positive user reviews and clear safety certifications. Avoid no-name batteries from unknown sellers, as they might lack important protection circuits against overcharging or overheating. A good third-party battery can be a safe and cost-effective choice.
How long should a Ryobi mower battery typically last?
In terms of daily runtime, a 4Ah battery on a 40V mower will typically last between 45 minutes to an hour on a single charge, depending on your grass thickness and mowing height. Over its lifetime, a well-cared-for Lithium-ion battery should last for several hundred charge cycles, which usually translates to about 3 to 5 years of regular seasonal use before you notice a significant drop in its capacity.
Can I use a higher Ah battery in my mower if it fits?
Absolutely, and I often recommend it if you need more runtime. As long as the voltage matches (e.g., 40V to 40V), a higher Amp-hour (Ah) battery is perfectly compatible. Your mower will only draw the power it needs, so using a 6Ah battery instead of a 4Ah just means you can mow for longer before needing a recharge. It won’t make your mower more powerful, but it will make it last longer on each outing.
What is the best way to store my mower battery during the off-season?
Don’t just throw it in a drawer fully charged or completely dead. For long-term winter storage, I follow the 40-80% rule. I charge my battery to about a 50-80% charge level and store it in a cool, dry place inside my house, like a closet—not in a freezing garage or a hot shed. Storing it at a partial charge helps preserve the health of the Lithium-ion cells over time.
My battery is dead and won’t charge at all. What can I do?
First, check the simple things. Make sure the charger is plugged in and the outlet works. Clean the battery’s terminals on both the battery and the charger with a dry cloth to ensure a good connection. If it’s been stored for a long time, the battery’s management system might have entered a protection mode. Leave it on the charger for at least two hours to see if it wakes up. If none of that works, it’s likely reached the end of its life. When looking for a new one, reviewing a list of the 10 Best Replacement Batteries for Ryobi Mowers 2025 is a great place to start your search for a reliable replacement.