40Volt Replacement for Ryobi 40V Battery Compatible with Ryobi 40 Volt Battery OP4026 OP40601 OP4050A OP4040 OP4030 OP4050 Compatible with 40V Cordless Power Tool

What It Is

This is a third-party 40V lithium-ion replacement battery designed to power any Ryobi 40V cordless lawn mower, trimmer, blower, or chainsaw. It replaces OEM models like OP4026, OP40601, OP4050A, OP4040, OP4030, and OP4050.

Fitment & Compatibility

• Works with: All Ryobi 40V tools (mowers, trimmers, blowers, chainsaws, etc.) that accept the standard Ryobi 40V slide-on battery platform.
• Check before buying: Measure your existing battery compartment depth—this battery is slightly bulkier than OEM Ryobi units. Some users report a tight fit in mower trays with narrow clearance.
• OEM vs aftermarket: This is a third-party battery, not manufactured by Ryobi. It will not work with Ryobi’s 18V One+ system or any non-40V tools.
• Charger compatibility: Use only with Ryobi 40V chargers (model OP4040 or similar). Do not attempt to charge with a 18V charger.

Key Things to Know

• Quality variance: Some units arrive with inconsistent charge levels; fully charge before first use. A few reports of cells failing within 6 months—check return policy.
• No fuel gauge: Unlike OEM Ryobi batteries, this model lacks a built-in charge indicator LED. You’ll need to test with your tool or charger.
• Installation: Slide on/off like OEM—no tools required. If it feels too tight, check for debris in the mower battery slot; do not force.
• Weight: Slightly heavier than OEM (about 1.5 lbs vs 1.3 lbs), which can affect balance on handheld tools.

Should You Buy It

Buy this if you need a budget spare for light-duty use (small lawns, occasional trimming) and don’t mind the lack of a fuel gauge. It’s not ideal for heavy mowing or professional use—stick with OEM for reliability and warranty coverage.