2-Pack 20V 4.0Ah Battery and Charger Combo Replacement for Worx WA3520, WA3525, WA3575, WA3578, WA3669, WA3732, WA3875, WA3881 – Compatible with 20 Volt Powershare Power Tools

What It Is

This is a 2-pack of 20V 4.0Ah lithium-ion batteries plus a dual-port charger, designed as a replacement for Worx’s WA3520, WA3525, WA3575, WA3578, WA3669, WA3732, WA3875, and WA3881 packs. It powers any Worx 20V Powershare tool, including lawn mowers, trimmers, blowers, and edgers.

Fitment & Compatibility

• Model check: Only compatible with Worx 20V Powershare tools and chargers. Not for 40V or 56V systems.
• OEM vs aftermarket: This is a third-party replacement, not Worx-branded. It fits physically and electrically but may lack OEM battery management features (e.g., over-discharge protection).
• Physical fit: Same footprint as original Worx packs – slides into any Worx 20V tool or charger bay. No modifications needed.
• What to verify before buying: Look at your tool’s voltage rating (must say 20V) and battery model number (e.g., WA3520). If your tool uses a removable battery pack, this will work.

Key Things to Know

• Quality: 4.8 stars from 33 reviews suggests consistent performance, but aftermarket packs can have shorter lifespan than OEM. Expect 1-2 seasons of regular use.
• Installation: Zero difficulty – charge the batteries fully (about 2 hours on the included charger), then slide into any compatible tool until it clicks.
• Common gotcha: The charger’s LED indicators may differ from OEM; check the manual for charging status (solid green = full, blinking = charging).
• Price: At $49.19 for two batteries and a charger, it’s about half the cost of two genuine Worx packs alone. Good value if you need multiple batteries.

Should You Buy It

Buy this if you own multiple Worx 20V tools and need spare batteries for longer runtime, or if your original packs are dead and you want a budget-friendly replacement. Skip it if you demand OEM reliability for heavy commercial use or prefer the warranty and safety features of genuine Worx packs.