2pack 4.0ah WA3525 Replacement for Worx 20V Battery Power Share for WA3575 WA3525 WA3520 WG151s WG891 WG155s WG251s WG255s Compatible with Worx Battery 20V

What It Is

This is a 2-pack of 4.0Ah replacement batteries for Worx 20V Power Share tools. It’s designed to power cordless lawn mowers, trimmers, blowers, and other Worx 20V yard equipment, offering extended runtime compared to the standard 2.0Ah packs.

Fitment & Compatibility

Before buying, confirm your tool uses the Worx 20V Power Share platform (not the older 18V or different 40V systems). This battery is a direct replacement for Worx models WA3525, WA3575, WA3520, and is compatible with tools like WG151s, WG891, WG155s, WG251s, WG255s. It fits all Worx 20V batteries and chargers (including the WA3746 and WA3880 chargers). Check the battery compartment shape—these are identical to OEM Worx packs, so they’ll snap in without modifications. Not compatible with Ryobi, DeWalt, or other battery brands.

Key Things to Know

• Capacity vs. OEM: 4.0Ah is higher than the standard 2.0Ah, so you get roughly double the runtime per battery. But it’s slightly heavier and bulkier than the 2.0Ah pack.
• Installation: No tools needed—just slide onto the tool’s battery mount until it clicks. Works with all Worx 20V chargers (red light means charging, green means full).
• Quality gotcha: As a 2-pack at this price, these are aftermarket (not genuine Worx). Some users report slightly shorter lifespan or slightly less power under heavy load compared to OEM. They’ll work fine for light-to-moderate use but may not last as many charge cycles.
• Charging note: If you have a fast charger, these batteries may charge slower than OEM packs (typical 1-2 hours for a full charge). Don’t leave them on the charger for days.

Should You Buy It

Buy this if you own multiple Worx 20V tools and need a budget-friendly way to extend runtime without paying OEM prices. It’s ideal for occasional use on mowers or trimmers, but if you rely on heavy continuous cutting (e.g., large lawns or thick grass), consider spending more on genuine Worx batteries for better long-term reliability.