2Pack 40V Lithium ion Battery 7.5Ah Extended Capacity Replacement for Ryobi 40V Battery Compatible with Ryobi 40Volt Battery OP4026 OP40261 OP40404 OP40501 OP40602 OP40804 Cordless Power Tools

What It Is

This is a 2-pack of 40V, 7.5Ah lithium-ion batteries designed as a higher-capacity replacement for standard Ryobi 40V batteries. They’re meant for extended runtime in Ryobi 40V cordless lawn mowers, trimmers, blowers, chainsaws, and other outdoor power tools.

Fitment & Compatibility

• Check your tool’s voltage: Only for 40V Ryobi tools. Will not work with 18V or 36V systems.
• OEM part cross-reference: Compatible with Ryobi models OP4026, OP40261, OP40404, OP40501, OP40602, OP40804, and most other standard 40V Ryobi batteries.
• Physical fit: These are larger and heavier than the stock 4.0Ah or 5.0Ah packs. Measure your battery compartment depth and clearance before buying—some mowers with tight enclosures may not close fully.
• Aftermarket note: Not made by Ryobi. May lack the same over-discharge protection or temperature sensors as OEM packs. Use only with tools that have their own low-voltage cutoff.

Key Things to Know

• Installation: Drops in like any Ryobi battery—slide in until it clicks. No tools or wiring required.
• Quality: Average build. Some users report slightly shorter lifespan per charge than OEM 7.5Ah packs, but still significantly longer runtime than a 4.0Ah.
• Charging: Use your existing Ryobi 40V charger. Charging time will be longer (up to 2–3 hours for a full charge) due to the higher capacity.
• Gotcha: The pack may not fit in some older Ryobi mower models with shallow battery trays. Always test fit before returning.

Should You Buy It

Buy this if you need extended runtime for a Ryobi 40V mower or trimmer and don’t mind aftermarket quality—it’s a solid value for double the capacity of a standard pack at half the OEM price. Skip it if you need guaranteed fit in tight compartments or want the reliability of OEM electronics.