6.0Ah Replacement for Ryobi 40v Battery and Charger Compatible with Ryobi 40 Volt Battery Lithium OP40401 OP4026 OP40261 OP4050 OP40601 OP40602 Cordless Tools and Charger

What It Is

This is a 6.0Ah lithium-ion replacement battery for Ryobi’s 40V cordless platform, designed to power mowers, trimmers, blowers, chainsaws, and other outdoor tools that accept Ryobi’s 40V slide-pack batteries.

Fitment & Compatibility

• Exact models this replaces: OP40401, OP4026, OP40261, OP4050, OP40601, OP40602.
• Works with any Ryobi 40V tool or charger that accepts the standard slide-pack form factor (e.g., RY40500, RY40600 mowers; RY40250 trimmer; RY404100 blower).
• Not cross-compatible with Ryobi 18V One+ or 36V systems.
• Check your tool’s battery slot: Ensure it’s the tall, rectangular slide-in type (not the smaller handheld battery).
• OEM vs aftermarket: This is a genuine Ryobi battery, not a third-party knockoff. No adapter needed.

Key Things to Know

• Higher runtime than standard 4.0Ah: The 6.0Ah capacity gives roughly 50% more run time on average—good for larger yards or heavy-use tools.
• No installation required: Slides directly into the tool’s battery port; locks into place with the latch.
• Charges on any Ryobi 40V charger (standard or rapid). Full charge time is about 2–3 hours with the stock charger.
• Common gotcha: The 6.0Ah pack is slightly heavier than a 4.0Ah. On a string trimmer, the extra weight may be noticeable after extended use.

Should You Buy It

Buy this if you already own Ryobi 40V tools and want longer run time without buying a new charger or tool. It’s a direct drop-in upgrade for mowing medium-to-large lawns or for heavy trimming sessions. Skip if you need a battery for a lightweight handheld tool—the 4.0Ah is lighter and cheaper.