2Pack 7500mAh Ultra High Capacity Replacement for Ryobi 40 Volt Battery and OP401 Charger Compatible with Ryobi 40v Battery OP40401 OP4026 OP40261 OP4050 OP40601 OP40602 Cordless Power Tools (Green)

What It Is

This is a two-pack of 7500mAh aftermarket lithium-ion batteries for Ryobi 40V cordless outdoor power tools. Designed for lawn mowers, string trimmers, leaf blowers, chainsaws, and other 40V Ryobi equipment—offering extended runtime compared to standard 4Ah or 5Ah packs.

Fitment & Compatibility

• OEM Cross-Reference: Replaces Ryobi part numbers OP40401, OP4026, OP40261, OP4050, OP40601, OP40602, and works with the OP401 charger.
• Tool Compatibility: Fits all Ryobi 40V tools (riding mowers excluded). Common platforms: 40V brushless mowers, 40V expand-it trimmers, 40V blowers, 40V chainsaws.
• Charger Check: Only use with the OP401 charger (or Ryobi 40V chargers rated for 4.0–8.0Ah). Do not use with older 18V or 36V chargers.
• Physical Fit: Same slide-in form factor as OEM packs—no modification needed. Dimensions: ~5.5″ x 4″ x 3.5″ per pack.
• Before Buying: Verify your tool’s battery slot accepts the standard 40V slide-pack (not the older “stick” style). If you own a 40V riding mower, these batteries are not compatible.

Key Things to Know

• Runtime: 7500mAh is ~50% more capacity than a standard 5Ah pack. Expect 1.5–2x longer run time on a mower (up to 60–70 minutes on a 21″ self-propelled model).
• Installation: Plug-and-play—no wiring or adapters. Slide onto tool until latch clicks. Charge fully before first use (3–4 hours on OP401).
• Quality: Aftermarket; cells are typically Chinese-sourced (not Samsung/LG). Reports of slightly shorter lifespan than OEM (2–3 seasons vs 4–5). Some units may not hold full charge after 18 months.
• Gotcha: Not compatible with Ryobi 40V “Link” or “USB” system batteries. Also, the included charger is not included—this is battery-only.

Should You Buy It

Buy this if you need extended runtime for heavy mowing or trimming sessions and are comfortable with aftermarket reliability. It’s a great value for the capacity per dollar, but if you prioritize long-term durability or have a fleet of Ryobi tools, stick with OEM packs.