POWTREE 2Pack 4.0Ah Replacement for Worx 20V Battery Lithium Compatible with Worx 20 Volt Battery Power Share Max WA3520 WA3525 WA3669.2 WG251s WG255s WG540s WG890 WG891 Cordless Power Tools

What It Is

This is a 2-pack of 4.0Ah aftermarket lithium-ion batteries designed to replace Worx 20V Power Share Max batteries. They’re meant for any Worx cordless tool or mower that uses the 20V Max platform, including string trimmers, blowers, and lawn mowers.

Fitment & Compatibility

Before buying, confirm your Worx tool uses the Power Share Max 20V battery system (the slide-on interface with a push-button release). These batteries are compatible with models like WA3520, WA3525, WA3669.2, and tools such as WG251s, WG255s, WG540s, WG890, and WG891. They will not fit older Worx 18V or 40V tools, nor any other brand. Check the battery port on your tool—if it matches the Worx 20V slide style, these will work. No deck size or measurement checks needed; this is purely a voltage and connector compatibility issue.

Key Things to Know

• Aftermarket quality: These are not OEM Worx batteries. Capacity (4.0Ah) is higher than standard 2.0Ah packs, so runtime is longer, but build quality and cell longevity may vary from genuine Worx.
• Installation: No tools required. Slide onto the tool until it clicks. Ensure the release button pops up fully for a secure fit.
• Charging: Use your existing Worx 20V charger. These batteries are compatible with Worx chargers, but charging time may be longer due to higher capacity.
• Common gotcha: If your tool fails to start or runs poorly, the battery may not be fully seated. Also, avoid fully draining the battery—recharge when power drops noticeably to extend lifespan.

Should You Buy It

Buy this if you need a budget-friendly spare or second battery for your Worx 20V Power Share Max tools and don’t mind aftermarket quality. It’s a solid value for the price, especially if you already own a Worx charger and want extra runtime for mowing or trimming. Skip it if you prefer OEM reliability for heavy-duty or commercial use.