2Pack 40v 7.5Ah OP4026A Battery Replacement for Ryobi 40V Battery Compatible with Ryobi 40 Volt Battery Lithium OP4026A OP4015 OP4040 OP40201 OP4050A OP4015 OP40261 OP4030 OP40401 Power Tools

What It Is

This is a 2-pack of 40V 7.5Ah lithium replacement batteries for Ryobi 40V cordless lawn mowers, trimmers, blowers, and other OPE tools. It’s designed to be a drop-in replacement for Ryobi’s OP4026A and other 40V batteries, giving you extended run time for larger yards or heavy use.

Fitment & Compatibility

• Voltage & Chemistry: Must be 40V lithium – this works with all Ryobi 40V tools (mowers, string trimmers, blowers, chainsaws, etc.). Not for 18V or 36V systems.
• Form Factor: Same slide-in design as Ryobi’s OP4026A, OP4015, OP4040, OP40201, OP4050A, OP40261, OP4030, OP40401. Fits all Ryobi 40V chargers (green and gray models) and tool ports.
• Amp-Hour: 7.5Ah – taller than standard 4Ah packs; check clearance under your mower deck or tool housing. If your mower has a low battery compartment, measure height before buying.
• OEM vs Aftermarket: This is a third-party replacement, not Ryobi branded. Works fine, but warranty and quality may differ from OEM. Check that your charger is 40V (not 18V) – any Ryobi 40V charger will work.

Key Things to Know

• Run Time: 7.5Ah gives roughly 50–70% more runtime than a standard 4Ah pack – good for ⅓–½ acre mowing on one charge.
• Installation: No tools needed – slide battery into tool or charger until it clicks. Remove by pressing the release tab.
• Quality & Safety: Aftermarket cells may have lower cycle life than OEM. Look for built-in BMS (overload/overheat protection) – most reputable aftermarket packs include it. Avoid cheap no-name brands.
• Weight & Handling: 7.5Ah packs are heavier (~2.5 lbs each) – can make handheld tools feel front-heavy. Fine for mowers and blowers.

Should You Buy It

Buy this if you need affordable extended runtime for Ryobi 40V tools and don’t mind aftermarket batteries. It’s a good value for large lawns or heavy users who need backup packs. Skip it if you require OEM reliability, warranty support, or have tight battery compartments that won’t fit the taller 7.5Ah case.