6.0Ah 20V Replacement for Worx 20V Battery Compatible with Worx Battery WA3520 WA3525 WA3575 WG151s WG155s WG251s WG255s WG540s WG545s 20 Volt Cordless Power Tools 4 Pack

What It Is

This is a 4-pack of 6.0Ah 20V replacement batteries compatible with Worx 20V cordless tools, designed to power mowers, trimmers, blowers, and other 20V Worx yard equipment. Each battery provides extended runtime compared to standard 2.0Ah or 4.0Ah packs.

Fitment & Compatibility

• Models confirmed to work: WA3520, WA3525, WA3575, WG151s, WG155s, WG251s, WG255s, WG540s, WG545s (and most other Worx 20V tools using the same slide-in battery interface).
• What to check before buying:
  • Verify your tool uses the slide-in Worx 20V battery style (not the older rectangular or 40V system).
  • Measure the battery compartment depth—these 6.0Ah packs are slightly taller than 2.0Ah/4.0Ah units (approx. 5.5” long, 2.5” wide, 3.5” tall).
  • Ensure your charger can handle 6.0Ah capacity; the Worx WA3730 or WA3740 chargers work fine.
  • Not compatible with Worx 40V tools, or older 18V/24V platforms.

Key Things to Know

• Quality: Third-party replacement (not OEM Worx), but uses same cells and overcharge/overdischarge protection as original packs. Expect 80–90% of OEM runtime.
• Installation: No tools required—slide battery into tool until it clicks. Remove by pressing the release latch.
• Common gotcha: These batteries may not fit in some Worx mowers with tight compartments (e.g., WG251s side-discharge models) due to the extra height. Test fit before returning.
• Charging: Use only a Worx 20V charger. Charging time is 2–3 hours per pack (from empty).

Should You Buy It

If you own multiple Worx 20V tools and need longer runtime without buying OEM packs at 2x the price, this 4-pack is a solid value. It’s especially useful for mowers or trimmers where you swap batteries mid-job. Avoid if you need exact OEM fit in a tight battery bay, or if you prefer manufacturer-guaranteed performance.