DTK Battery Replacement for Ryobi 40V Battery 6.2Ah OP4040 OP4026 OP4030 OP4050 OP4060A Compatible with Ryobi 40Volt Cordless Tool ion Battery Packs

What It Is

This is an aftermarket 40V lithium-ion battery replacement (6.2Ah capacity) designed to power any Ryobi 40V cordless tool, including lawn mowers, trimmers, blowers, and chainsaws. It’s a direct swap for depleted OEM Ryobi 40V batteries.

Fitment & Compatibility

• Models confirmed compatible: OP4040, OP4026, OP4030, OP4050, OP4060A (and any Ryobi 40V tool that uses the standard slide-on battery interface).
• What to check before buying:
  • Your tool must be Ryobi 40V (not 18V or 80V). Look for “40V” on the battery port or tool label.
  • Measure your existing battery’s physical dimensions (roughly 5.5 x 3.5 x 2.5 inches) to ensure it fits in your mower’s battery compartment—some newer Ryobi mowers have tight slots.
  • This is an aftermarket part, not OEM. It may not charge on Ryobi rapid chargers (only standard 40V chargers). Test with your charger first.
  • Not compatible with Ryobi 40V “Edge” or “Link” system batteries (different connector shape).

Key Things to Know

• Quality variance: Aftermarket cells may deliver slightly less runtime than OEM Ryobi batteries, especially under heavy load (e.g., thick grass). Some users report 80-90% of OEM performance.
• Installation: Zero difficulty—slide onto tool until it clicks. No wiring or tools needed.
• Charger caution: Works best with the standard Ryobi 40V charger (model OP406A or similar). Avoid using with rapid chargers (some aftermarket batteries lack the internal BMS for fast charging and may overheat).
• Warranty: Typically 30-day return, no long-term guarantee. If you need reliability for daily commercial use, OEM is safer.

Should You Buy It

Buy this if you need a budget-friendly backup battery for occasional residential mowing or light yard work and already own a standard Ryobi 40V charger. Skip it if you rely on your mower daily for thick lawns or commercial use—OEM batteries offer better longevity and warranty support.