2 Pack 6500mAh Replacement for Worx 20V Battery and Charger Kit for WA3525 WA3520 WA3575 Compatible with Worx Battery 20V and 40V (2X20V) Cordless Tools

What It Is

This is a 2-pack of 6500mAh aftermarket lithium-ion batteries designed to replace Worx 20V batteries (models WA3525, WA3520, WA3575) and power any Worx 20V cordless tool, as well as 40V tools that use two 20V batteries in series (2X20V).

Fitment & Compatibility

• Check your tool’s voltage: These batteries work with all Worx 20V tools and any 40V tool that accepts two 20V batteries (e.g., Worx WG303.1, WG896, WG925). Do not use with true 40V single-battery tools.
• Verify battery model: Compatible with WA3525, WA3520, WA3575. If your Worx battery has a different model number (e.g., WA3595, WA3616), it may not fit.
• Physical dimensions: Each battery measures roughly 4.5 x 3 x 2.5 inches. Measure your tool’s battery slot to ensure it fits—some newer Worx tools have slightly recessed compartments.
• Charger: Uses the standard Worx 20V charger (sold separately). The pack does not include a charger.

Key Things to Know

• Aftermarket quality: These are not OEM Worx. Expect slightly lower runtime and a shorter lifespan than genuine Worx batteries, especially under heavy use.
• No installation required: Simply slide the battery into the tool until it clicks. No tools or wiring needed.
• Capacity vs. original: 6500mAh is higher than most original Worx 20V batteries (typically 2000–4000mAh), so runtime per charge is longer—but actual capacity may vary by 10–20% from stated.
• Common gotcha: The batteries may feel slightly loose in some older Worx tools. If the tool doesn’t power on, press the battery firmly until you hear a second click.

Should You Buy It

Buy this if you have multiple Worx 20V or 2X20V 40V tools and need extra runtime without paying OEM prices. It’s a good value for light-to-medium yard work (mowing, trimming, leaf blowing) where you don’t mind slightly shorter overall battery life. Skip it if you need maximum reliability for heavy commercial use or if you prefer the guaranteed fit and warranty of genuine Worx batteries.