40 Volt Lithium-Ion 6.0 Ah Battery OP40602 Replacement for Ryobi 40V Battery 6.0Ah Compatible with Ryobi 40V Tools and Chargers 2-Pack

What It Is

This is a 40V, 6.0 Ah lithium-ion battery pack (two-pack) designed as a replacement for the Ryobi OP40602. It powers Ryobi 40V cordless lawn mowers, trimmers, blowers, chainsaws, and other 40V tools, offering longer runtime than standard 4.0 Ah packs for larger yards or heavy-use tasks.

Fitment & Compatibility

• Voltage & Chemistry: Must be used with Ryobi 40V tools and chargers only. Not compatible with 18V or 36V systems.
• OEM vs. Aftermarket: This is a third-party replacement, not official Ryobi. It fits Ryobi’s 40V battery slot (slide-in design) but may not seat perfectly in some older tool models. Check if your tool has a tight battery compartment.
• Physical Size: Roughly 6.5 x 4.5 x 3.5 inches per battery. Ensure your mower’s battery tray has enough clearance for the 6.0 Ah pack (slightly larger than 4.0 Ah).
• Charger Compatibility: Works with Ryobi 40V chargers (model OP404, OP406, etc.), but charging speed may be slower on older chargers. Avoid using with non-Ryobi chargers.
• Tool Models: Compatible with Ryobi 40V mowers (e.g., RY40180, RY40190), trimmers (RY40220), blowers (RY40440), and chainsaws (RY40520). Verify your tool’s model number.

Key Things to Know

• Quality Variance: Third-party batteries often have shorter lifespan and lower cycle count than OEM. Expect 200-300 charge cycles vs. 500+ for genuine Ryobi.
• No Battery Gauge: These packs lack the built-in LED charge indicator found on official Ryobi 6.0 Ah batteries. Check charge with your tool’s display.
• Installation: Drop-in replacement—no tools needed. Ensure contacts are clean and battery clicks firmly into place. Loose fit may cause intermittent power loss.
• Safety: Use only with Ryobi 40V chargers. Overheating or swelling can occur if charged on incompatible or damaged chargers. Store in a cool, dry place.

Should You Buy It

If you need a budget-friendly two-pack for light-to-moderate use (e.g., weekly mowing of a 1/4-acre yard) and don’t mind trading some longevity for cost savings, this is a solid option. Avoid if you rely on your tools for daily commercial work or need the reliability and capacity gauge of OEM batteries.