20V 6.0Ah Replacement for Worx 20V Battery PowerShare 20V Battery for WA3520 WA3525 WA3575 WA3578 WG151s WG155s WG251s WG255s WG540s WG545s WG890 WG891

What It Is

This is a 20V 6.0Ah lithium-ion replacement battery compatible with Worx’s PowerShare battery platform. It powers any 20V Worx tool or mower that uses the WA3520, WA3525, WA3575, WA3578, WG151s, WG155s, WG251s, WG255s, WG540s, WG545s, WG890, or WG891 battery packs.

Fitment & Compatibility

• Works with: All 20V Worx tools and mowers that accept PowerShare batteries (including Landroid robotic mowers, string trimmers, blowers, chainsaws, and hedge trimmers).
• Does NOT work with: 40V Worx tools, 60V tools, or older 18V Worx models.
• OEM vs aftermarket: This is a third-party replacement. It lacks the Worx logo and may have slightly different cell quality than genuine Worx packs.
• Physical check: The battery slides onto the same rail mount as OEM packs. Measure your original battery’s dimensions (approx. 5.1″ x 3.1″ x 2.6″) to confirm fit in tight compartments.
• Voltage: 20V max (18V nominal). Use only with 20V-rated tools.

Key Things to Know

• Higher capacity: 6.0Ah vs the standard 2.0–4.0Ah OEM packs. Expect longer runtime (up to ~50% more than a 4.0Ah), but heavier weight (approx. 1.5 lbs).
• Charging: Works with Worx 20V chargers (models WA3740, WA3880, etc.). Charge time is roughly 3–5 hours on a standard 2A charger.
• Installation: Slide onto tool until it clicks; press release button to remove. No tools required.
• Common gotcha: Some users report the battery doesn’t fit tightly in older Worx mower decks (pre-2020). If it feels loose, add a thin foam strip to the battery base for a snug fit.
• Quality note: Aftermarket packs may have shorter lifespan (fewer charge cycles) than OEM. Check reviews for cell brand (usually Samsung or LG cells are best; generic cells degrade faster).

Should You Buy It

Buy this if you need a spare or replacement battery for your 20V Worx mower or tool and want higher runtime without paying OEM prices. Skip it if you need maximum reliability for heavy commercial use, or if your tool is still under warranty (using aftermarket batteries can void it). For light to moderate residential use, it’s a solid value.