10 Best Ryobi Battery 40v 2025 in the United States

The Ryobi 40V 4.0 Ah Lithium-Ion Battery OP4040 is an excellent choice for users seeking reliability and performance in their outdoor cordless tools. With a 4.0Ah capacity, it provides impressive runtime, allowing you to work longer without constantly needing to recharge. This battery is specifically designed for compatibility with a range of Ryobi's 40V tool models, making it a versatile option for those already invested in the Ryobi ecosystem. Many users appreciate that it is lighter and offers better performance compared to traditional NiCD batteries, which can reduce fatigue during extended use, making it a user-friendly choice.

On the downside, this battery does not come with a charger, meaning you'll need to purchase a compatible charger separately if you don't already own one. Additionally, while its weight is a strength, some users may still find it a bit heavy after prolonged use, especially compared to smaller batteries. It's worth noting that while the battery has decent durability, warranties can vary, so checking the specific terms before purchase is advisable.

The Ryobi 40V OP4040 battery is a strong option for those needing a dependable power source for their Ryobi tools, but potential buyers should be aware of its compatibility requirements and the need for a separate charger.

The Ryobi 40-Volt Lithium-Ion 6.0 Ah High Capacity Battery stands out with its high capacity, making it ideal for users needing longer run times on their power tools. Its 6.0 Amp-hour capacity ensures that it can handle more demanding tasks without requiring frequent recharges. One of the notable strengths is its compatibility with all Ryobi 40-Volt lithium-ion tools and chargers, which means it can be a versatile addition to your existing Ryobi toolset.

The fade-free lithium-ion power ensures consistent performance throughout the battery's charge cycle, and the onboard battery life indicator helps you keep track of the remaining power easily. At 4.11 pounds, it may be on the heavier side, which could be a downside if you need to carry it around frequently. However, its durable construction should withstand regular use.

This battery is best suited for users who already own or plan to invest in Ryobi's 40-Volt tool lineup and need a reliable, high-capacity power source for extended use.

This 7.5Ah Ryobi 40V replacement battery stands out for its high capacity, which means it can power your cordless tools for longer periods compared to standard batteries. It’s compatible with a wide range of Ryobi 40V tools and chargers, making it a versatile choice if you own multiple devices. The battery includes built-in safety features like protection against overcharging and short circuits, helping to keep both the battery and your tools safe during use.

A handy LED indicator lets you easily check the charge level, so you’ll know when it’s time to recharge. Weighing just over 7 ounces, this battery is lightweight and easy to handle. Users have noted its reliable performance and lifespan, often comparing it favorably to original Ryobi batteries. Although the battery supports fast charging, exact charge times are not specified.

If you need a durable and long-lasting battery for Ryobi 40V cordless tools, this model offers great value with solid features and broad compatibility.