40V OP40601 Replacement for Ryobi 40V Battery 5.0Ah,Compatible with Ryobi 40 Volt Lithium Battery OP4026 OP4050A OP4040 OP4030 OP4050 Compatible with 40V Cordless Power Tool

What It Is

This is a 40V, 5.0Ah lithium-ion replacement battery compatible with Ryobi’s 40V cordless lawn mowers, string trimmers, blowers, and other 40V power tools. It serves as a direct substitute for Ryobi’s OEM OP40601 battery, delivering the same voltage and capacity for extended runtime.

Fitment & Compatibility

• Check voltage and connector: This battery fits all Ryobi 40V tools and chargers using the standard slide-on interface. It will not work with Ryobi’s 18V One+ system.
• OEM vs aftermarket: It is a third-party replacement, not made by Ryobi. It matches the physical dimensions of the OP40601, OP4026, OP4050A, OP4040, OP4030, and OP4050 batteries.
• Deck size irrelevant: Battery compatibility is determined by the tool’s voltage and connector, not mower deck size. Ensure your tool is 40V and uses the same slide-lock design.
• Measure before buying: Confirm the battery compartment depth in your tool (typically 6.5 inches long, 3.5 inches wide). This battery is identical in size to Ryobi’s original 5.0Ah pack.

Key Things to Know

• Quality varies: Third-party batteries may have slightly lower internal cell quality than Ryobi OEM. Expect 80–90% of original runtime under heavy load.
• Installation is trivial: Slides onto any Ryobi 40V tool or charger in seconds—no tools or modifications required.
• Charging compatibility: Works with Ryobi’s 40V standard and rapid chargers (e.g., OP4040 charger). It may take slightly longer to charge than an OEM pack.
• Warranty risk: Using a non-OEM battery can void your tool’s warranty if damage occurs. Check your tool’s warranty terms before buying.

Should You Buy It

Buy this if you need a spare or replacement 40V battery at a lower price than Ryobi OEM and you’re comfortable with a third-party product that delivers comparable performance for most residential jobs. Avoid it if you rely on maximum runtime, need OEM reliability for commercial use, or want to preserve your tool’s warranty.