DTK 2 Packs Battery Replacement for Ryobi 40V Battery 6.2Ah OP4040 OP4026 OP4030 OP4050 OP4060A

What It Is

This is an aftermarket lithium-ion battery pack designed to replace Ryobi 40V batteries (6.2Ah capacity) for cordless lawn mowers, trimmers, blowers, chainsaws, and other 40V Ryobi tools. It’s a direct drop-in replacement for multiple Ryobi OEM models, offering run time similar to a new 6.2Ah original.

Fitment & Compatibility

• Check your tool’s voltage: Only works with Ryobi 40V tools – not 18V or 36V.
• Compatible OEM models: OP4040, OP4026, OP4030, OP4050, OP4060A, and any Ryobi 40V battery that uses the same slide-on form factor (standard Ryobi 40V interface).
• Physical fit: The battery dimensions are identical to OEM 6.2Ah packs – it will slide into any Ryobi 40V tool or charger that accepts a standard 40V battery (including 4.0Ah and 5.0Ah slots). No adapter needed.
• Charger compatibility: Works with Ryobi 40V chargers (model numbers like 40V 1.5A, 2.0A, or rapid chargers). Do not use with 18V chargers.
• Deck/mower size: No deck size restrictions – fits any Ryobi 40V mower (e.g., RY40180, RY401140, RY40190) as long as the battery compartment accepts a 6.2Ah pack.

Key Things to Know

• Aftermarket vs. OEM: This is a third-party battery, not made by Ryobi. It may have slightly lower peak power or shorter lifespan than a genuine Ryobi battery, but at roughly half the price it’s a common trade-off.
• Installation: No tools required – just slide the battery into the mower or tool until it clicks. Charge fully before first use (3–5 hours with a standard charger).
• BMS protection: Built-in battery management system prevents overcharge, over-discharge, and short circuits. It should work fine with Ryobi chargers, but some users report that very old chargers may not charge aftermarket packs properly.
• Indicator lights: Functions like OEM – press the button to check charge level. Lights may be slightly less accurate than original.
• Gotcha: If your Ryobi tool has a “fuel gauge” that reads battery health, it may show a lower percentage than actual capacity due to aftermarket cell chemistry differences.

Should You Buy It

Buy this if you need a spare or replacement 40V battery for your Ryobi lawn mower or other 40V tools and want to save money over OEM. It’s a solid budget option for light-to-medium lawn work (e.g., mowing a 1/4 acre lot with a single battery). Skip it if you rely on maximum runtime, need OEM reliability for heavy commercial use, or have an older Ryobi charger that may not recognize aftermarket batteries.