2Pack 7.5Ah OP4026 Replacement for Ryobi 40V Batteries, Compatible with Ryobi 40V Battery OP4040 OP40404 OP40201 (7.5Amps-2PC)

What It Is

This is a 2-pack of 7.5Ah replacement batteries for Ryobi 40V cordless lawn mowers, trimmers, blowers, and other outdoor power equipment that use the OP40-series battery platform. They’re designed to power high-drain tools like self-propelled mowers for longer run times than the standard 4Ah or 5Ah packs.

Fitment & Compatibility

Before buying, verify that your Ryobi 40V tool accepts the “OP40” slide-on battery interface (most Ryobi 40V tools do, but some older models use a different connector). This pack replaces OEM models OP4040, OP40404, OP40201, and OP4026. It is not compatible with Ryobi’s 18V One+ system or 40V tools that require a “push-in” style battery (e.g., early 40V trimmers). Check your tool’s battery slot: if it has a raised rail and a locking tab on top, this will fit. Deck size doesn’t matter—only the battery port shape.

Key Things to Know

• Quality vs. OEM: These are aftermarket cells. Expect slightly less runtime than genuine Ryobi 7.5Ah batteries (typically 10-15% less) and no warranty support from Ryobi.
• Installation: Trivial—slide onto tool until it clicks. No tools, wires, or modifications needed.
• Charger compatibility: Works with any Ryobi 40V charger (stock or aftermarket) that uses the same port. Do not mix with 18V chargers.
• Common gotcha: The 7.5Ah capacity makes these heavier than 4Ah packs. On a mower, this adds noticeable weight to the handle (about 1.5 lbs extra per battery). Ensure your mower’s handle and battery tray are secure.

Should You Buy It

Buy this if you need two high-capacity batteries for extended mowing or multiple tools and want to save roughly 30% vs. buying two genuine Ryobi packs. Skip it if you require OEM reliability for heavy daily use, or if your tool struggles with the extra weight—stick with lighter 4Ah or 5Ah OEM batteries instead.