2Pack 7.0Ah WA3520 Battery Replacement for Worx 20V Battery WA3525 WA3575 WX550L WG151 WG163 WG629 WG547 WG545 WG801 WG320 WX176L WX169L WX682L Compatible with Worx 20V Cordless Power Tools

What It Is

This is a 2-pack of 7.0Ah 20V replacement batteries designed to power Worx cordless lawn mowers, trimmers, blowers, and other 20V tools. The higher capacity (7.0Ah vs standard 2.0–4.0Ah) extends runtime for larger yards or heavy-use tasks.

Fitment & Compatibility

• Check your tool’s voltage: Only for Worx 20V (max) tools. Not compatible with 40V or 56V systems.
• Model match: Fits WA3520, WA3525, WA3575, and tools listed in the title (WX550L, WG151, WG163, WG629, WG547, WG545, WG801, WG320, WX176L, WX169L, WX682L). If your tool isn’t listed, confirm it uses the same slide-on battery mount.
• Physical fit: Slide-on design with the same dimensions as OEM Worx 20V batteries. Measure your battery compartment to be safe (approx. 4.5″ x 3″ x 2.5″).
• Aftermarket note: This is a third-party replacement, not genuine Worx. Performance and lifespan may differ.

Key Things to Know

• Charging: Use only a Worx 20V charger (WA3738, WA3880, or similar). Do not use a different brand charger—risk of damage or fire.
• Installation: Slide onto tool until it clicks. No tools needed. Remove before charging.
• Quality: Mixed reviews—some report shorter lifespan than OEM. The 7.0Ah rating is likely based on lower-drain cells; real-world runtime may be less than a genuine 5.0Ah Worx battery.
• Safety: Aftermarket lithium batteries lack OEM overcharge/overheat protection. Remove from charger once full and store in a cool, dry place.

Should You Buy It

Buy if you need extra runtime for light-to-moderate yard work (trimming, leaf blowing, small mowing) on a budget and already have a Worx charger. Skip if you rely on heavy daily use or want maximum reliability—genuine Worx batteries offer better longevity and safety certification.