40 Volt 6500mAh Replacement for Ryobi 40V Battery OP4040 OP4026 OP4030 OP4050 OP4060A with Ryobi 40V Charger OP401

What It Is

This is a 40-volt, 6500mAh replacement battery designed to power Ryobi 40V cordless lawn mowers, trimmers, blowers, and other outdoor equipment. It offers higher capacity than standard 4.0Ah or 5.0Ah packs, extending runtime for larger yards or heavy-duty tasks.

Fitment & Compatibility

• Direct replacement for these Ryobi 40V models: OP4040, OP4026, OP4030, OP4050, OP4060A. Also compatible with any Ryobi 40V tool using the same slide-on battery interface.
• Check your equipment’s voltage requirement: This is 40V—not compatible with 18V or 36V Ryobi tools.
• Charger compatibility: Works with the Ryobi 40V charger model OP401 (and most other Ryobi 40V chargers). Do not use with a 20V or 18V charger.
• Physical fit: Same size and slide-lock design as OEM packs. Ensure your mower’s battery compartment has enough clearance for the slightly taller 6.5Ah case (about 0.3” taller than a 4.0Ah pack).
• Not for Ryobi 40V “Expand-It” attachments that require a separate battery platform.

Key Things to Know

• Installation: Trivial—slide onto tool until it clicks. No tools or wiring required.
• Quality note: This is an aftermarket battery, not OEM Ryobi. Some users report slightly shorter lifespan or slightly less peak power under heavy load compared to genuine Ryobi packs.
• Common gotcha: The 6500mAh rating is based on ideal conditions. Actual runtime depends on tool load, temperature, and age—expect 20–30% more runtime than a 5.0Ah pack, not double.
• Charging time: Takes longer to fully charge (3–4 hours on standard Ryobi charger) than a 4.0Ah battery. Plan accordingly.

Should You Buy It

Buy this if you own multiple Ryobi 40V tools and need longer runtimes without buying a second OEM battery, or if you want a budget-friendly spare for your mower. Skip it if you require guaranteed OEM reliability for heavy commercial use or if your mower’s battery compartment is tight—measure first.