40v 7500mAh OP4026A Battery Replacement for Ryobi 40V Battery 7.5Ah Compatible with Ryobi 40 Volt Battery Lithium OP4026A OP4040 OP40201 OP4050A OP4015 OP40261 OP4030 OP40401 OP4060 Power Tools

What It Is

This is a 40-volt, 7500mAh (7.5Ah) lithium-ion battery replacement for Ryobi 40V cordless lawn mowers, trimmers, blowers, and other outdoor power tools that use the slide-on battery interface. It directly replaces the OEM Ryobi OP4026A and other 7.5Ah models.

Fitment & Compatibility

Before buying, verify your tool uses the Ryobi 40V slide-on battery platform (common on brushless mowers, string trimmers, and leaf blowers). This battery fits all Ryobi 40V tools that accept OP4026A, OP4040, OP40201, OP4050A, OP4015, OP40261, OP4030, OP40401, or OP4060 packs. It does not fit older 18V Ryobi tools or the 40V “push-button” platform. Measure the battery compartment depth (approx. 5.5” x 3.5” x 2.5”) to ensure clearance; some compact mowers may have tight fitment. This is an aftermarket replacement—not OEM—so performance and longevity may vary.

Key Things to Know

• Capacity: 7.5Ah provides longer run time than standard 4Ah or 5Ah packs—expect 45–60 minutes on a 20” mower under normal load.
• Quality: User reviews note it works well initially, but some report reduced capacity after 6–12 months of heavy use. Not all cells are matched for extreme cold or high-drain tools.
• Installation: Slides on/off the same as OEM; no tools required. Ensure the locking tabs click firmly. Will not charge in Ryobi OEM chargers if the BMS (battery management system) is incompatible—test immediately.
• Gotcha: This battery may be slightly heavier than OEM due to larger cells, which can affect balance on handheld tools like trimmers.

Should You Buy It

Buy this if you need a budget-friendly spare for light-to-moderate use (weekly mowing, occasional trimming) and are comfortable with aftermarket risks. Avoid if you rely on the tool for heavy commercial use or need guaranteed OEM reliability and warranty support.