BatPower 2-Pack 40V 6.5Ah Lithium-Ion Replacement Battery and Charger Starter Kit Compatible with Ryobi 40V System, High Capacity Batteries and Charger OP4050A OP401 (3-Piece Set)

What It Is

This is a 3-piece aftermarket starter kit that includes two 40V 6.5Ah lithium-ion batteries and a charger, designed to power Ryobi 40V lawn mowers, string trimmers, leaf blowers, and other outdoor tools in the Ryobi 40V system.

Fitment & Compatibility

Before buying, verify your Ryobi tool is part of the 40V platform (not 18V or 24V). This kit is not OEM—it’s a third-party replacement compatible with Ryobi models using OP4050A or OP401 batteries. The batteries have the same slide-mount interface and voltage as genuine Ryobi packs. Do not use with Ryobi 40V tools that require a specific battery shape (e.g., some older mowers with a recessed slot). Check your tool’s battery compartment for clearance: these packs are slightly taller than OEM, so measure the depth and ensure the latch alignment matches. The charger is a standard 40V wall unit with a cooling fan—works with genuine Ryobi 40V batteries too.

Key Things to Know

• Quality vs. OEM: Aftermarket cells may have lower cycle life and less consistent voltage under load. Expect slightly shorter runtime than a genuine 6.0Ah Ryobi battery, especially in cold weather.
• Installation: Zero difficulty—slide the battery onto the tool until it clicks. The charger plugs into a standard 120V outlet.
• Common gotcha: The included charger may not charge as fast as Ryobi’s original (typically 2–3 hours for a full charge). Also, some users report the battery indicator lights are less accurate.
• Warranty: This is a 3-piece kit, so if one battery fails, you still have a spare. But aftermarket batteries rarely come with a robust warranty—check the seller’s return policy.

Should You Buy It

If you need a budget-friendly way to get two backup batteries and a charger for your Ryobi 40V tools and don’t mind slightly lower performance and durability than OEM, this kit is a solid value. It’s best for light-to-moderate use on a single mower or multiple tools. Avoid if you rely on your mower for heavy-duty, daily commercial use or require the longest possible runtime.