Replacement 20V Battery and Charger WA3742 Starter Kit, for Battery WA3525 WA3520 WA3575, Compatible with Worx 20 Volt Cordless Tools WG184 WG261 WG324 WG545.6 WG584 WG644 WG779

What It Is

This is a replacement 20V battery (WA3742) and charger starter kit for Worx cordless lawn mowers, trimmers, and blowers. It powers tools like the WG184, WG261, WG324, WG545.6, WG584, WG644, and WG779, and is also compatible with Worx WA3525, WA3520, and WA3575 batteries.

Fitment & Compatibility

• Battery models: Works as a direct replacement for Worx WA3525, WA3520, and WA3575 batteries.
• Tool compatibility: Fits Worx 20V cordless tools listed above—check your tool’s model number on the sticker or manual.
• OEM vs aftermarket: This is an OEM Worx battery and charger, not a third-party knockoff. It should match factory specs exactly.
• Physical check: Ensure your tool’s battery slot is the same shape—Worx 20V tools use a slide-on interface. Measure the battery compartment if unsure (approx. 5.5 x 3 x 2.5 inches).
• Charger: The included charger is a standard Worx 20V charger (not fast-charge). It will charge all listed battery models.

Key Things to Know

• No installation needed: Just slide the battery into your tool until it clicks. Charger plugs into a standard wall outlet.
• Battery capacity: This is likely a 2.0Ah battery (check listing details). It’s fine for light trimming or small mowing jobs but may run out faster on larger mowers or heavy use.
• Compatibility gotcha: Does not work with Worx 40V or 60V tools. Only 20V slide-on battery tools.
• Warranty: Worx typically offers 2-year warranty on batteries. Keep your receipt.

Should You Buy It

Buy this if you need a reliable OEM replacement battery and charger for a Worx 20V cordless mower, trimmer, or blower—especially if your old battery no longer holds a charge. It’s a solid, no-hassle upgrade for light-duty yard work, but if you have a large lawn or need longer runtime, consider a higher-capacity (4.0Ah) Worx battery instead.