5.0Ah Replacement for Ryobi 40V Battery Lithium Ion Compatible with Ryobi Battery 40V Cordless Power 40 Volt Battery OP4040 OP40401 OP4026 OP40261 OP4050 OP40201 OP4060(Green)

What It Is

This is a 5.0Ah lithium-ion replacement battery for Ryobi 40V cordless lawn mowers, trimmers, blowers, and other outdoor power tools. It provides longer runtime than a standard 4.0Ah pack, ideal for larger yards or heavy-duty trimming.

Fitment & Compatibility

• Compatible Ryobi 40V battery models: OP4040, OP40401, OP4026, OP40261, OP4050, OP40201, OP4060 (and most green 40V Ryobi tools).
• Check your tool’s voltage requirement: Only for 40V Ryobi tools—do not use with 18V or 36V systems.
• Physical fit: This is a slide-on battery pack; ensure your tool’s battery slot matches the same shape and rail system as OEM Ryobi 40V packs.
• OEM vs aftermarket: This is an aftermarket replacement, not Ryobi OEM. Confirm your tool’s warranty policy—using third-party batteries may void coverage.
• Measurements: Approx. 7 x 5 x 4 inches; weight ~2.5 lbs. Verify clearance in your mower’s battery compartment.

Key Things to Know

• Installation: No tools required—slides directly into any compatible Ryobi 40V tool. Push firmly until it clicks.
• Quality: 4.1/5 rating from 30 reviews—generally reliable, but some users report slightly shorter lifespan than OEM Ryobi batteries after heavy use.
• Gotcha: Not compatible with Ryobi 40V “OP” series chargers that have a specific communication chip—may not charge if the charger requires proprietary handshake. Use a standard Ryobi 40V charger (model OP4060 or later) or a universal 40V lithium charger.
• Runtime: 5.0Ah gives ~20-30% more run time than a 4.0Ah pack on a mower. Expect ~30-45 minutes of continuous mowing on a small to medium lawn.

Should You Buy It

Buy this if you need a cost-effective spare or replacement for your Ryobi 40V tools and don’t mind an aftermarket battery with slightly shorter total lifespan than OEM. It’s a solid choice for light to medium use, but skip it if you rely on your mower for heavy commercial work or if your charger is an older model that may not support third-party packs.