2Pack 7500mAh Replacement 40V Batteries for Ryobi 40V Battery Compatible with Ryobi 40Volt Battery OP40261 OP40404 OP40501 OP40602 OP4075A Power Tools

What It Is

This is a 2-pack of 7500mAh aftermarket 40V lithium-ion batteries designed to replace Ryobi’s OEM 40V batteries. They power any Ryobi 40V cordless lawn mower, trimmer, blower, chainsaw, or other 40V yard tool.

Fitment & Compatibility

• Compatible Ryobi models: OP40261, OP40404, OP40501, OP40602, OP4075A. Also works with any Ryobi 40V tool that uses the standard slide-in battery interface.
• Check before buying: Confirm your tool uses the Ryobi 40V platform (not 18V One+). Measure the battery compartment depth—these are slightly taller than some OEM packs (about 5.5 inches). Verify your charger supports 40V lithium-ion (most Ryobi 40V chargers do). Aftermarket, not OEM—may not fit tight compartments on older mowers.
• Not compatible with: Ryobi 18V One+ tools, 36V systems, or any non-Ryobi brand.

Key Things to Know

• Quality vs OEM: 7500mAh is higher capacity than most OEM packs (typically 4000-6000mAh). Expect longer runtime, but cells may degrade faster than Ryobi’s own.
• Installation: No tools needed—slide battery onto tool until it clicks. Ensure contacts align; if it feels loose, it may not fit your specific model.
• Common gotcha: These batteries may not charge on older Ryobi 40V chargers (pre-2015). Use a current model charger (OP404A or later). Also, the pack’s plastic housing is slightly thicker—check clearance on tight mower decks.
• Warranty: Typically 1-year limited (vs 2-3 years on OEM). Read the seller’s return policy carefully.

Should You Buy It

Buy this if you need a budget-friendly, high-capacity backup for multiple Ryobi 40V tools and your charger is compatible. Skip it if you require OEM reliability, tight fit in older mowers, or a longer warranty—stick with genuine Ryobi batteries.