7500mAh 1 Pack OP4075A Battery Replacement for Ryobi 40V Battery Compatible with Ryobi 40 Volt Batteries OP40601 OP40602 OP4050 OP40501 OP4040 OP40404(Green)

What It Is

This is a 7500mAh aftermarket battery pack designed to replace Ryobi’s 40V lithium-ion batteries. It powers any Ryobi 40V cordless lawn mower, trimmer, blower, or chainsaw that accepts the standard slide-in battery form factor.

Fitment & Compatibility

• Model match: Compatible with Ryobi part numbers OP40601, OP40602, OP4050, OP40501, OP4040, and OP40404. Also works with any Ryobi 40V tool that uses the same slide-in interface (check your tool’s battery slot shape).
• Physical check: Measure your original battery’s dimensions (approx. 5.5 x 3.5 x 2.5 inches) and verify the slide rail alignment matches. This pack is slightly taller than some OEM units, so test clearance in tight battery compartments (e.g., some mower models with a battery cover).
• Voltage: 40V nominal – do not use on 18V or 36V tools.
• OEM vs aftermarket: This is a third-party replacement, not Ryobi-branded. It will not communicate with Ryobi’s “IntelliPort” charger features (e.g., charge status LEDs may not work). Use only with standard Ryobi 40V chargers (model OP406A, OP408A, or OP412A).

Key Things to Know

• Capacity: 7500mAh (270Wh) – roughly 30% more runtime than a standard 5.0Ah Ryobi OEM pack. Expect 45–60 minutes of continuous mowing on a single charge.
• Installation: No tools required – slides directly into the tool’s battery port. Ensure the latch clicks fully to avoid disconnection during use.
• Charging time: 2–3 hours with a standard Ryobi 40V charger. Do not use fast chargers rated above 4A – this pack lacks thermal management for rapid charging.
• Common gotcha: The pack may not fit tightly in some older Ryobi mower models (e.g., RY40180) due to slightly thicker plastic housing. Test fit before relying on it for a full job. Also, it lacks a fuel gauge, so you’ll need to monitor runtime manually.

Should You Buy It

Buy this if you need a budget-friendly, high-capacity backup for a Ryobi 40V tool and don’t mind losing the OEM fuel gauge and charger-smart features. It’s ideal for occasional use or for extending runtime on a mower without paying for a genuine Ryobi pack. Skip it if you require tight fitment in a compact battery compartment or need reliable communication with smart chargers.