2 Pack 3.5Ah Replacement for Worx 20v Battery WA3578 WA3575 WA3520 WA3525 + Portable WA3732 Charger for Worx Batteries 20v

What It Is

A 2-pack of 3.5Ah 20V lithium-ion replacement batteries plus a portable charger for Worx cordless lawn mowers, trimmers, blowers, and other 20V Power Share tools. The batteries replace Worx models WA3578, WA3575, WA3520, and WA3525, while the charger is compatible with WA3732.

Fitment & Compatibility

• Check your tool’s voltage: This kit is for 20V Worx Power Share tools only—not 40V, 56V, or 80V systems.
• OEM part numbers: Replaces WA3578, WA3575, WA3520, WA3525. If your original battery is one of these, it fits.
• Charger compatibility: The included charger works with WA3732. If your charger is a different model (e.g., WA3742, WA3880), verify voltage and connector shape—most 20V Worx chargers are cross-compatible, but not all.
• Physical fit: These are standard slide-on batteries for Worx 20V tools. Measure your battery slot: 4.5" long x 2.5" wide x 1.5" tall. If your battery is significantly larger or smaller, double-check.
• Not for: Worx Landroid robots, 12V tools, or any non-Worx brand.

Key Things to Know

• Aftermarket quality: These are third-party batteries, not OEM. Some users report slightly shorter runtime than genuine Worx batteries, but 3.5Ah is a solid capacity for most mowing tasks.
• Installation: No tools needed—slide onto tool until it clicks. Remove by pressing the release button.
• Charging time: The portable charger takes about 2–3 hours for a full charge. It’s compact but not fast-charging.
• Common gotcha: The charger may not work with older Worx 20V tools that use a different charging port shape. Test fit before relying on it.

Should You Buy It

If you own multiple Worx 20V tools and need extra run time at a lower cost than OEM, this 2-pack with charger is a solid value. It’s best for light to medium mowing, trimming, and blower jobs. Avoid if you require maximum runtime for heavy commercial use or need a fast charger.