2 Pack 20V 7.0Ah WA3520 Worx Battery Replacement for Worx 20V Battery Compatible with WG151 WA3575 WA3512 WA3578 WG151s WA3525 WG155 WA3520

What It Is

This is a 2-pack of 20V 7.0Ah lithium-ion replacement batteries for Worx 20V cordless lawn mowers, trimmers, blowers, and other tools in the Worx PowerShare platform. Designed as a direct drop-in for the OEM WA3520 battery, it provides extended runtime for medium-to-large yards.

Fitment & Compatibility

• Works with: Worx 20V tools using the WA3520, WA3575, WA3512, WA3578, WA3525, WG151, WG151s, WG155, and WA3520 battery models. Also compatible with any Worx 20V PowerShare tool (e.g., WG155, WG151, WG252, WG252.9, WG284, WG284.1, WG284.2, WG284.9, WG385, WG385.1, WG385.9, WG545, WG545.1, WG545.9, WG546, WG546.1, WG546.9, WG901, WG901.1, WG901.9, WG902, WG902.1, WG902.9, WG903, WG903.1, WG903.9, WG904, WG904.1, WG904.9, WG905, WG905.1, WG905.9).
• Not compatible with: Worx 40V or 80V tools, or any 20V tools from other brands (e.g., Black+Decker, Ryobi, Kobalt).
• Check before buying: Confirm your tool’s battery model number (printed on the battery label) matches one of the compatible OEM numbers above. Measure the battery slot dimensions: this battery is 4.1 x 2.6 x 2.9 inches. If your tool uses a different shape (e.g., slide-pack vs. post-mount), it won’t fit.

Key Things to Know

• Quality: Aftermarket replacement; not OEM Worx. Some users report slightly shorter lifespan than genuine Worx batteries (2-3 seasons vs. 3-5 seasons). Cells are typically Chinese-made, but the 7.0Ah capacity is higher than the standard 2.0Ah or 4.0Ah.
• Installation: Simple drop-in replacement—no tools or modifications needed. Charge with any Worx 20V charger (WA3740, WA3741, or WA3742). Do not mix with other brand chargers.
• Gotchas: The 7.0Ah battery is physically larger and heavier than 2.0Ah or 4.0Ah versions. It may feel bulky in handheld tools (e.g., trimmers) but is fine for mowers. Overcharging protection is built-in, but avoid leaving it on the charger for days.
• Warranty: Typically 1-year limited warranty from the seller; read the listing carefully as some aftermarket brands offer no returns on batteries.

Should You Buy It

Buy this if you need a budget-friendly, high-capacity replacement for a Worx 20V mower or blower and don’t mind sacrificing some longevity vs. OEM. It’s a good value for light-to-medium use, but if you rely on your tool daily or need maximum reliability, stick with genuine Wor