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.

This Ryobi 40V 7000mAh lithium battery replacement comes as a 2-pack and is designed to work with a wide range of Ryobi 40V cordless power tools. With a high capacity of 7.0Ah, it offers longer run times compared to standard batteries, allowing you to get more done before needing to recharge. The battery also features an LED indicator to show remaining power, helping you manage your work without surprises.

It supports fast charging and includes important safety features like protection against overcharge, overheating, and overcurrent, which helps extend the battery’s life and protects your tools. Weighing around 5.66 pounds for the pair, it’s a bit on the heavier side but still manageable for most users. One of the biggest advantages is its broad compatibility with many Ryobi battery models and chargers, making it a versatile choice if you have multiple tools.

The 12-month warranty and responsive customer service add peace of mind. Being a third-party brand, some users might prefer original Ryobi batteries for guaranteed longevity and brand support. If you rely heavily on your Ryobi 40V tools and want extended runtime without breaking the bank, this battery pack provides a solid balance of capacity, compatibility, and safety features.