Lasica Replacement for Ryobi 40V 6.0Ah Battery, Compatible with Ryobi 40-Volt Collection Cordless Power Tools RY405010 RY40890VNM OP4040 OP4050A OP40601 OP40201 OP4026 OP4030 OP4060 Lithium Battery

What It Is

This is an aftermarket 40V 6.0Ah lithium battery replacement for Ryobi 40V cordless outdoor tools—mowers, trimmers, blowers, chainsaws, and more. It’s designed for higher runtime than standard 4.0Ah or 5.0Ah packs, suited for medium to large yards.

Fitment & Compatibility

• Exact fit with Ryobi 40V tools that use the standard slide-on battery interface (e.g., RY405010, RY40890VNM, OP4040, OP4050A, OP40601, OP40201, OP4026, OP4030, OP4060). Not compatible with Ryobi 18V or 36V systems.
• Check your mower’s battery bay dimensions—this pack is slightly taller than some OEM 4.0Ah units. Measure the slot depth if you have a tight enclosure (e.g., some push mowers with low decks).
• Mower deck size doesn’t matter—fitment is purely about the tool’s battery mount and clearance. Works on 16-inch to 21-inch mowers as long as the tool accepts 40V slide packs.
• Not compatible with Ryobi 40V “old style” batteries that have a different latch design (pre-2015 models). Verify your tool’s battery release button is centered and uses two side rails.

Key Things to Know

• Aftermarket performance: Rated 4.1/5 from ~1,500 reviews. Users report 80–90% of OEM runtime in most tools, but slightly less peak power under heavy load (e.g., thick grass on a mower).
• No installation needed—slide on until it clicks. No wiring or modification required. Charge with any Ryobi 40V charger (OPC4040, OPC4060, etc.).
• Common gotcha: This battery may not fit in some Ryobi 40V string trimmers with a curved shaft due to the pack’s wider base. Test fit before tightening the tool’s battery latch.
• Lacks a fuel gauge—no LED charge indicator on the pack itself. You’ll need to rely on the tool’s low-battery warning or a separate charger display.

Should You Buy It

Buy if you need a budget-friendly spare battery for Ryobi 40V tools and don’t mind slightly less runtime than OEM. Skip if you require a fuel gauge, peak power for heavy-duty mowing, or a guaranteed fit in tight battery bays—stick with Ryobi’s official 6.0Ah pack.