2Pack 6.0Ah Replacement for Ryobi 40V Battery Compatible with Ryobi 40 Volt Lithium ion Battery OP4050A, OP4015, OP4026, OP40201 and Cordless Power Tools

What It Is

This is a 2-pack of 6.0Ah aftermarket lithium-ion batteries designed as a replacement for Ryobi 40V cordless lawn mowers, string trimmers, blowers, chainsaws, and other 40V tools. Each battery provides 216Wh of power, extending runtime compared to standard 4.0Ah or 5.0Ah packs.

Fitment & Compatibility

• Compatible models: OP4050A, OP4015, OP4026, OP40201, plus most Ryobi 40V tools using the standard slide-in interface.
• Check before buying: Verify your tool’s battery port matches Ryobi’s 40V slide-on design (flat, with two side rails and a locking tab). Measure battery compartment depth—6.0Ah packs are slightly taller than 4.0Ah units (approx. 1 inch taller). Not compatible with 18V or 20V Ryobi tools.
• OEM vs aftermarket: This is a third-party replacement, not made by Ryobi. It lacks Ryobi’s proprietary fuel gauge and may have slightly different charge/discharge protection circuits.

Key Things to Know

• Installation: No tools needed—slide battery onto tool until it clicks. Remove by pressing the release button and pulling.
• Quality: User feedback is positive, but some report slightly shorter lifespan than OEM Ryobi batteries (expect 300–500 charge cycles vs 500+ for genuine). Avoid fully draining to prolong life.
• Charging: Works with Ryobi 40V chargers (OP406, OP408, etc.), but charging time may be longer (2–3 hours) due to higher capacity. Do not use a 18V charger.
• Common gotcha: The 6.0Ah pack is heavier (approx. 2.5 lbs each) and may cause balance issues on lighter tools like string trimmers. Also, it may not fit under some mower decks with tight battery wells—measure clearance.

Should You Buy It

If you need extended runtime for heavy mowing or trimming on a budget, this 2-pack delivers good value at under $45 per battery. It’s best for users who already own Ryobi 40V tools and want a spare set without paying OEM prices. Avoid if you require maximum longevity or have tools with very tight battery compartments.