2 Packs 5.0Ah Replace for Worx 20V Battery WA3525 WA3578 WA3575 WA3520 WG151s, Compatible with Worx 20V Power Tools and Charger

What It Is

This is a two-pack of 5.0Ah replacement batteries for Worx 20V cordless lawn mowers, trimmers, blowers, and other 20V Power Share tools. It’s designed to power your equipment or serve as a spare for longer runtime.

Fitment & Compatibility

Before buying, confirm your tool uses the Worx 20V Power Share battery platform (most Worx 20V tools do). This pack is compatible with models using WA3525, WA3578, WA3575, WA3520, or WG151s batteries. It will also charge on any standard Worx 20V charger. Check your tool’s battery port – it must be the slide-on style (not the older push-in type). Measure the battery dimensions: roughly 5.1 x 3.0 x 2.4 inches. If your tool’s battery bay is tight, verify clearance. This is an aftermarket battery, not OEM Worx, so it may have slight fit differences – it should slide on firmly but not wobble.

Key Things to Know

• Quality & runtime: Rated at 5.0Ah, this offers about 25% more runtime than the standard 4.0Ah Worx battery. Expect consistent power for mowing a small lawn or extended trimmer use.
• Installation: No tools needed – simply slide onto the tool until it clicks. Remove by pressing the release button.
• Charging: Works with any Worx 20V charger, but charge time is longer (about 2–3 hours) due to higher capacity. Avoid using a fast charger not rated for 5.0Ah.
• Common gotchas: Some users report the battery indicator lights may not match OEM accuracy. Also, aftermarket batteries may not hold charge as long in storage – top off before long breaks.

Should You Buy It

This is a solid value for Worx owners who need extra runtime without paying OEM prices. It’s ideal for small to medium yards where one battery isn’t enough, or as a backup for trimming and edging. If you rely on your mower for large lawns or need guaranteed OEM reliability, stick with genuine Worx batteries. For most home users, this two-pack delivers dependable power at a fraction of the cost.