Powering your Ryobi 40V lawn mower effectively is the key to a pristine lawn without the hassle of cords or gas. The right battery doesn’t just start your mower; it ensures you have enough runtime to finish the job, even on larger properties. With various capacities and options available, from genuine Ryobi OEM batteries to reliable third-party alternatives, selecting the ideal power source can significantly improve your yard work experience.
This roundup simplifies your search by highlighting ten of the best Ryobi 40V batteries for 2025. We’ve compiled a range of choices, from high-capacity units for extended mowing sessions to convenient multi-packs that ensure you’re never without power. Our goal is to provide you with the information needed to choose a battery that delivers consistent performance and reliability for your outdoor power equipment.
Our Top Picks for Ryobi 40V Lawn Mower Batteries
- Ryobi 40V 4.0 Ah Lithium-Ion Battery OP4040
- 6.0Ah Replacement for Ryobi 40V Battery Lithium
- ANTRobut 6.5Ah Replacement Ryobi 40V Battery and Charger Kit
- Compatible with Ryobi 40V 6.0Ah High-Output Battery
- Biswaye 40V 6Ah Lithium Battery Replacement for Ryobi
- Koedsion 40V 6.0Ah Lithium-Ion Battery Replacement
- Koedsion 5.0Ah Replacement for Ryobi 40V Battery
- Moticett 40 Volt 6000mAh Lithium-Ion Battery Replacement
- 2-Pack Ryobi OEM 40V 4.0Ah Lithium-Ion Battery set
- Ryobi 40V HP 4.0Ah Lithium-Ion Battery
Ryobi 40V 4.0 Ah Lithium-Ion Battery OP4040
As the original equipment manufacturer (OEM) standard, the Ryobi OP4040 is a trusted choice for powering a wide array of 40V outdoor tools. Its 4.0Ah capacity provides a solid runtime for average-sized lawns, making it a versatile and reliable power source. This battery is designed to work seamlessly with models like the RY40406, RY40540, and RY40530 lawn mowers.
Weighing less and running longer than older NiCD battery technology, this lithium-ion option reduces user fatigue and increases productivity. It represents the baseline for quality and compatibility that Ryobi users have come to expect, ensuring your mower and other tools perform as intended.
6.0Ah Replacement for Ryobi 40V Battery Lithium
This 6.0Ah replacement battery offers a significant upgrade in capacity, providing up to triple the runtime of some original batteries. With a high 6000mAh capacity and 240Wh wattage, it is built to handle demanding tasks and larger mowing areas without needing a recharge. It maintains full compatibility with all Ryobi 40-Volt tools and chargers.
The battery features an intelligent system that optimizes performance and provides overload protection. This communication between the tool, battery, and charger helps to safeguard your equipment and extend the overall life of the battery, offering a smart and powerful alternative to OEM options.
ANTRobut 6.5Ah Replacement Ryobi 40V Battery and Charger Kit
For those needing a complete power solution, the ANTRobut kit includes both a high-capacity 6.5Ah battery and a compatible OP401 fast charger. This bundle is ideal for users who are starting fresh or need an extra charging station. The 6.5Ah capacity is among the highest available, offering extended fade-free performance for the most demanding lawn care sessions.
The included 2A output charger can complete a charge in approximately three hours, minimizing downtime. With a built-in intelligent safety system and an LED indicator for charge status, this kit provides a comprehensive and secure way to keep your mower running.
Compatible with Ryobi 40V 6.0Ah High-Output Battery
This replacement battery is engineered for universal compatibility with the Ryobi 40V system, including popular models like the OP4050A and OP4060A. Its 6.0Ah capacity delivers up to 60 minutes of continuous use, which is about 33% longer than the standard 4.0Ah battery. It is built to last for over 500 charge cycles, offering long-term value.
Safety and convenience are key features, with a six-layer protection system that guards against overcharging, short-circuits, and other potential issues. The four-LED power indicator allows for easy monitoring of the remaining charge, helping you plan your mowing sessions effectively.
Biswaye 40V 6Ah Lithium Battery Replacement for Ryobi
The Biswaye battery is designed as an exact match for OEM models, ensuring a perfect fit and reliable function with your Ryobi 40V lawn mower. Its 6.0Ah high capacity provides up to twice the runtime of a standard 3.0Ah battery, making it suitable for larger properties. The use of international high-quality battery cells ensures a strong and consistent power output.
This battery is compatible with a wide range of Ryobi 40V tools and chargers, bringing new life to your existing equipment. It’s a robust alternative that focuses on delivering extended performance without compromising on compatibility.
Koedsion 40V 6.0Ah Lithium-Ion Battery Replacement
This Koedsion 6.0Ah battery is built as a replacement for Ryobi’s HP HIGH PERFORMANCE EDGE batteries, making it an excellent choice for newer, more powerful tools. The 6000mAh capacity ensures you have ample power to tackle tough mowing conditions. A helpful LED indicator is included to monitor the remaining power at a glance.
It offers wide compatibility with Ryobi 40-volt HP cordless power tools and is also designed to work with Ryobi’s hyper chargers for rapid recharging. This combination of high capacity and compatibility with advanced charging systems makes it a forward-thinking choice.
Koedsion 5.0Ah Replacement for Ryobi 40V Battery
For those seeking a balance between capacity and value, the Koedsion 5.0Ah battery presents a compelling option. It provides a noticeable boost in runtime over the standard 4.0Ah battery without the premium of a 6.0Ah model. This makes it ideal for medium to large lawns where extra power is needed.
It maintains broad compatibility with a long list of Ryobi 40V tools and chargers, ensuring it will integrate smoothly into your existing yard maintenance system. This battery is a practical mid-range solution for reliable performance.
Moticett 40 Volt 6000mAh Lithium-Ion Battery Replacement 2-Pack
The Moticett 2-pack offers exceptional value for users who need uninterrupted power for large jobs or multiple tools. Each battery in the pack features a 6.0Ah (6000mAh) capacity, providing long runtime and increased work efficiency. Having two batteries means one can be charging while the other is in use.
This set is compatible with a range of Ryobi 40V tools and chargers, making it a versatile and cost-effective solution for serious lawn care enthusiasts. The two-pack configuration effectively eliminates downtime, allowing for continuous mowing and landscaping work.
2-Pack Ryobi OEM 40V 4.0Ah Lithium-Ion Battery set
This two-pack of genuine Ryobi OP4040 batteries guarantees full OEM compatibility and performance. It is the perfect solution for users who prefer to stick with the manufacturer’s brand and want the assurance of a backup power source. The onboard fuel gauge LED system allows you to check the charge level and battery health quickly.
A notable feature is the cold weather performance, as these batteries can function in temperatures as low as -4°F (-20°C). This reliability, combined with the convenience of a two-pack, makes it an excellent investment for year-round yard maintenance.
Ryobi 40V HP 4.0Ah Lithium-Ion Battery
The Ryobi 40V HP battery is designed for use with the High Performance line of tools, which are engineered for increased power and speed. While it has a 4.0Ah capacity, its specialized design ensures it can deliver maximum output to compatible HP tools, potentially offering better cutting performance in demanding conditions.
If you own a Ryobi HP lawn mower, this battery is optimized to work in concert with the tool’s advanced electronics for superior results. It represents the synergy between Ryobi’s latest tool technology and their dedicated power sources.
Buying Guide: How to Choose the Right Ryobi 40V Battery for Your Lawn Mower
When I first started looking at Ryobi 40V batteries for my lawn mower, I was a bit overwhelmed by the choices. It is not just about picking the biggest one; it is about finding the right balance of power, runtime, and value for your specific yard. After using this system for years, I have learned what really matters. Here is my guide to help you pick the perfect battery to keep your mower running strong.
The first thing I always check is the Amp-hour (Ah) rating. This number tells you the battery’s capacity, which directly translates to how long it will run. For a small to medium-sized lawn, a 4Ah or 5Ah battery might be all you need. If you have a larger property or a lot of thick grass, you will want to step up to a 6Ah or even the massive 12Ah battery. More Ah means more cutting time, but it also means a heavier and more expensive battery. Think about your typical mowing session. Do you finish with power to spare, or are you constantly pushing the battery to its limit? Your answer will guide you.
Next, consider the battery’s technology. The standard Ryobi 40V batteries are great, but the newer Lithium+ HP models are a step up. They are designed to deliver more consistent power, especially under heavy load. For a lawn mower that might bog down in wet or thick grass, that extra punch can make a real difference in performance. It is the difference between the mower slowing down a little and the mower stopping completely. If your mower is compatible, I think the HP batteries are worth the investment for the peace of mind alone.
You should also think about your other tools. The beauty of the Ryobi 40V system is that the same battery powers your mower, your string trimmer, your leaf blower, and more. If you already own a few 40V tools, it makes sense to choose a battery that can serve as a powerhouse for all of them. A larger capacity battery, like a 6Ah or higher, becomes a shared resource for your entire yard work routine. This is a much smarter approach than buying a small, dedicated battery for each tool.
Finally, do not forget about the charger. A standard charger gets the job done, but if you are in a hurry or have multiple batteries, a rapid charger can be a game-changer. Some kits bundle a fast charger with the battery, which is a combo I always look for. Being able to recharge a battery in an hour instead of several can mean the difference between finishing the yard today or having to wait until tomorrow. When selecting one of the 10 best Ryobi 40V batteries for lawn mower power in 2025, pairing it with a capable charger completes your power system.
Frequently Asked Questions
How long does a Ryobi 40V battery typically last on a single charge in a mower?
This is the most common question, and the answer is, “it depends.” The runtime is heavily influenced by the battery’s Amp-hour (Ah) rating and your mowing conditions. A 4Ah battery might give you 30-45 minutes in average grass, while a 6Ah could push that to 60 minutes or more. Thick, wet grass will drain any battery much faster than dry, thin grass. For a reliable estimate, check the specifications for your specific mower model, as they often provide runtime estimates based on battery size.
Can I use any Ryobi 40V battery in my 40V lawn mower?
Yes, you can! This is the best part of the Ryobi ONE+ system. Any Ryobi 40V battery is physically and electrically compatible with any Ryobi 40V lawn mower. You are not locked into a specific Ah rating. You can use a compact 2Ah battery or a heavy-duty 12Ah battery in the same mower. The mower will simply run for a shorter or longer time based on the capacity of the battery you insert. This flexibility lets you build a collection of batteries that fit your needs and budget.
What is the difference between the standard and the Lithium+ HP batteries?
The main difference is power delivery. Standard Ryobi 40V batteries are excellent, but the Lithium+ HP versions are built with advanced technology to provide increased power and performance, especially for tools that demand a lot of energy, like lawn mowers and snow blowers. Under heavy load, an HP battery is designed to maintain a higher voltage for longer, which means your mower is less likely to slow down when you hit a tough patch. For demanding applications, the HP line is a solid upgrade.
How should I store my Ryobi 40V batteries during the winter?
Proper storage is key to a long battery life. I always recommend storing your batteries in a cool, dry place, away from direct sunlight. The ideal storage charge is not fully charged nor completely dead. Ryobi suggests storing them with a charge level between 40% and 60%. You can usually achieve this by using the battery until it has about two bars of charge left and then storing it. Always check the user manual for the most accurate, model-specific storage instructions to keep your batteries in top shape for the next season.
Is it okay to leave my Ryobi 40V battery on the charger after it’s full?
Ryobi’s chargers are smart chargers, which means they are designed to switch to a maintenance or “trickle charge” mode once the battery is fully charged. This prevents overcharging. So, while it is generally safe to leave it on the charger for a day or two, it is not a good long-term practice. For the overall health of the battery, it is better to remove it from the charger once the indicator light shows a full charge. This helps preserve the battery’s maximum capacity over its lifetime.
Where can I find a good deal on the 10 best Ryobi 40V batteries for lawn mower power in 2025?
The best deals are often found by buying batteries as part of a “tool-only” purchase for a new tool, or by looking for holiday sales and special bundles at major home improvement stores like The Home Depot. Direct Factory Outlet (DFO) stores and online marketplaces can also have good prices, but be sure you are buying from an authorized retailer to guarantee you get a genuine Ryobi battery with a valid warranty. Buying a kit that includes both a tool and a battery can sometimes be more cost-effective than purchasing the battery alone.