2Pack 7500mAh OP4026A Battery Replacement for Ryobi 40v Battery 7.5Ah Compatible with Ryobi 40 Volt Battery Lithium OP40601 OP4050A OP4040 OP4075A Compatible with Batteries 40V Power Tools (2Pack)

What It Is

This is an aftermarket 40V lithium-ion battery pack (2-pack, 7,500mAh each) designed as a drop-in replacement for Ryobi’s OP4026A and other 40V Ryobi batteries. It powers any Ryobi 40V cordless lawn mower, trimmer, blower, chainsaw, or other outdoor power tool that uses the standard Ryobi 40V slide-on battery platform.

Fitment & Compatibility

• Direct fit for: Ryobi 40V batteries with model numbers OP4026A, OP40601, OP4050A, OP4040, OP4075A, and any Ryobi 40V tool that accepts those.
• Check before buying: Verify your tool’s battery port accepts the standard Ryobi 40V slide-in connector (flat rectangular base with two rails). This does NOT fit Ryobi 18V One+ tools or older 36V/24V systems.
• Physical size: Same dimensions as OEM OP4026A (approx. 6.5” x 4” x 3.5”). Ensure your mower’s battery compartment has enough clearance for the height—some tight-fit decks may require removing the battery cover.
• OEM vs aftermarket: This is a third-party battery, not made by Ryobi. It lacks Ryobi’s proprietary communication chip, so some tools may not display accurate fuel gauge or charge level on the tool’s indicator.

Key Things to Know

• Capacity vs OEM: 7,500mAh (7.5Ah) is higher than the standard Ryobi 4.0Ah or 5.0Ah packs. Expect longer run time, but it will be heavier (about 2.5 lbs per battery).
• Installation: No tools required—slide battery onto tool until it clicks. Charge with any Ryobi 40V charger (OP408, OP412, or newer models). Do not use with a 18V charger.
• Common gotchas:
  • Some users report the plastic latch feels slightly looser than OEM—secure the battery with a strap if you experience vibration on mowers.
  • Not compatible with Ryobi’s “Link” or “IntelliPort” smart charger features (will charge, but won’t communicate status).
  • Avoid fully draining the battery—lithium-ion cells in aftermarket packs can fail if run to zero. Recharge when the tool slows.
• Quality: Average 4.4 stars from 1,508 reviews, but a minority report early cell failure (within 6 months). Warranty is typically 1 year from seller—keep proof of purchase.

Should You Buy It

Buy this if you need a budget-friendly, high-capacity upgrade for a Ryobi 40V mower or trimmer and don’t mind losing OEM fuel gauge accuracy. It’s a solid choice for occasional use or as a spare set to extend runtime on large lawns. Skip it if you rely on precise battery status indicators or need maximum reliability for daily professional use—stick with genuine Ryobi batteries.