2-Pack 7.5Ah OP4026 40 Volt Lithium Replacement Battery and OP401 Charger Compatible with Ryobi 40V Battery OP4050A OP40601 OP4026A OP4040 OP4030 OP4050 OP4015 OP40261 OP40201 Power Tools (Green)

What It Is

This is a 2-pack of 7.5Ah 40V lithium replacement batteries plus a charger, designed for Ryobi 40V lawn mowers, trimmers, blowers, chainsaws, and other outdoor power tools that accept the OP40-series platform.

Fitment & Compatibility

Check the battery model number on your existing Ryobi tool or charger. This set replaces OP4026, OP4050A, OP40601, OP4026A, OP4040, OP4030, OP4050, OP4015, OP40261, and OP40201. It also works with any Ryobi 40V tool that uses the standard slide-on battery interface (not the older 18V or 36V systems). Measure the battery compartment: the 7.5Ah pack is slightly taller than the stock 4.0Ah or 5.0Ah packs—ensure your mower deck or tool housing has clearance. This is an aftermarket set, not OEM Ryobi; it will not charge on Ryobi’s rapid charger (OP4060) or the 2A charger (OP401A) unless specified as compatible.

Key Things to Know

• Capacity & runtime: 7.5Ah provides ~50% more runtime than a standard 5.0Ah battery, but adds weight. Expect longer mowing sessions with fewer swaps.
• Charger compatibility: The included charger is a generic 40V unit. It works with the listed OP40-series batteries, but may not charge OEM Ryobi batteries correctly or safely.
• Installation: Slide the battery onto the tool until it clicks—no tools needed. The aftermarket fit may be slightly tighter or looser than OEM; ensure the latch engages fully.
• Common gotcha: Some users report the battery indicator lights are less accurate than OEM, and the plastic housing can be less durable. Avoid dropping or exposing to heavy rain.

Should You Buy It

Buy this if you need a cost-effective way to get longer runtime for multiple Ryobi 40V tools and don’t mind aftermarket build quality. Skip it if you rely on rapid charging, need guaranteed OEM fit, or use tools in wet or rough conditions—spend more on genuine Ryobi batteries for better durability and warranty support.