RYOBI 40-Volt Lithium-Ion 2.0 Ah Battery

What It Is

A 40-volt, 2.0 amp-hour lithium-ion battery that powers Ryobi’s 40V line of cordless lawn mowers, trimmers, blowers, and other outdoor equipment. It’s a standard-capacity pack suited for small to medium yards (under ¼ acre) or light-duty tasks.

Fitment & Compatibility

• Platform: Only works with Ryobi 40V tools. Not compatible with Ryobi 18V or 36V systems.
• Mower Models: Fits all Ryobi 40V mowers (e.g., RY40180, RY40190, RY401020, RY401140). Check your mower’s model number on the underside or near the battery port.
• Deck Size: No deck-size restrictions—the battery fits any 40V mower regardless of cutting width (16-21 inches).
• OEM vs. Aftermarket: This is OEM Ryobi. Aftermarket alternatives often lack the same charge-holding capacity or safety circuitry. Stick with OEM for warranty and performance.
• Physical Check: Ensure the battery slides fully into the mower’s port; debris or corrosion can prevent proper contact.

Key Things to Know

• Run Time: On a 21-inch mower, expect ~30-40 minutes of continuous cutting (thick grass reduces runtime). Not enough for a full acre without a second battery.
• Charging: Uses Ryobi 40V charger (sold separately). Full charge takes ~60-90 minutes. Do not use an 18V charger.
• Installation: Tool-free—slide onto mower until it clicks. No wiring or modifications needed.
• Common Gotcha: If the battery won’t charge, check for a blinking red light (indicates overheat or end-of-life). Let it cool 30 minutes before retrying.

Should You Buy It

Buy this if you have a Ryobi 40V mower for a small lawn (under ¼ acre) and need a spare or replacement for light-duty trimming. Skip it if you need more runtime for large yards—step up to the 4.0Ah or 6.0Ah battery instead.