2 Pack 3.5Ah 20V Tool Battery Replacment for Worx Battery 20V Power Share WA3525 WA3520 WA3575 Replacs Worx 20 Volt Batteries for WG154 WG155s WG251s WG890 WG891

What It Is

This is a 2-pack of 3.5Ah 20V replacement batteries for Worx Power Share tools. They’re designed to power any Worx 20V cordless lawn mower (like the WG154, WG155, WG251, WG890, WG891), string trimmers, blowers, and other yard tools in the Power Share platform.

Fitment & Compatibility

• Voltage & Platform: Must be 20V Worx Power Share – these won’t work with 40V, 56V, or other brands.
• Model Numbers: Directly replaces Worx WA3525, WA3520, WA3575. Compatible with WG154, WG155s, WG251s, WG890, WG891 mowers.
• Physical Fit: Same slide-in design as OEM. Measures about 5.5 x 3 x 2.5 inches. Verify your tool’s battery compartment shape – most Power Share tools accept this, but older or niche models may vary.
• Aftermarket Note: This is a third-party replacement, not genuine Worx. It may be slightly heavier or have a different plastic texture, but the connector and rails are identical.

Key Things to Know

• Installation: Slide in until latch clicks. No tools needed. Remove by pressing the release button and pulling out.
• Charge Time: Use your original Worx charger – should take 2–3 hours from empty. Don’t use a fast charger not rated for 3.5Ah.
• Run Time: 3.5Ah gives roughly 30–45 minutes on a small mower (WG154) or longer on a trimmer. Less than OEM 4.0Ah but equal to WA3525.
• Quality Check: Some users report slightly shorter lifespan than genuine Worx. Keep an eye on cell swelling or overheating – stop use immediately if either occurs.

Should You Buy It

Buy this if you need a budget-friendly spare battery for light-to-medium yard work and already own a Worx 20V Power Share tool. It’s a solid value for the price, but if you mow a large lawn all at once or demand maximum runtime, stick with the genuine WA3525 for reliability.