2Pack 7.5Ah OP40601 Replacement for Ryobi 40V Battery Compatible with Ryobi 40 Volt Battery Lithium OP4040 OP40401 OP4026 OP40261 OP4050 OP40201 Compatible with 40V Battery Power Tools (Green-3PC)

What It Is

This is a 2-pack of 7.5Ah aftermarket lithium-ion batteries designed to replace the Ryobi 40V OP40601 battery. It powers any Ryobi 40V cordless lawn mower, trimmer, blower, chainsaw, or other 40V yard tool that uses the standard Ryobi 40V slide-on battery interface.

Fitment & Compatibility

• Check your tool’s voltage: Only for Ryobi 40V tools. Will not work with 18V, 36V, or 80V systems.
• OEM replacement numbers: Compatible with Ryobi models OP4040, OP40401, OP4026, OP40261, OP4050, OP40201, and OP40601. If your original battery is one of these, this will fit.
• Physical fit: Uses the standard Ryobi 40V slide-on mount. Fits all Ryobi 40V mowers (push, self-propelled, riding), trimmers, blowers, chainsaws, and hedge trimmers. No adapter needed.
• Measurement check: Each battery measures roughly 5.5 x 3.5 x 4 inches. Weighs about 2.5 lbs. Verify your battery compartment has clearance—some older mower models have tight slots for the taller 7.5Ah pack.
• Aftermarket note: This is a third-party battery, not genuine Ryobi. It will not communicate with Ryobi’s proprietary “IntelliCell” system, so your tool’s fuel gauge may show inaccurate levels or blink.

Key Things to Know

• Capacity vs. weight: 7.5Ah is high capacity—longer runtime (up to 60+ minutes on a mower) but heavier. Expect ~2.5 lbs per battery, which may feel bulky on handheld tools.
• No installation required: Slide on, click, and go. No tools or wiring.
• Common gotcha: Some users report the battery doesn’t sit perfectly flush on older Ryobi 40V tools (pre-2020). If it feels loose, check the latch tabs for debris or wear.
• Charging: Works with any Ryobi 40V charger (OP406, OP408, etc.). Full charge from empty takes 2–4 hours. Do not mix with OEM batteries in the same tool—voltage mismatch can cause shutdown.

Should You Buy It

Buy this if you need a budget-friendly, high-capacity backup for your Ryobi 40V mower or blower and don’t mind the extra weight or the lack of a precise fuel gauge. Skip it if you require OEM reliability, a lightweight battery for handheld tools, or perfect compatibility with older Ryobi 40V gear.