Fancy Buying 40V 3.0Ah Battery for Worx 40V Battery WA3580 Compatible with Worx WG180 WG280 WG380 WG580（Not Fit for 2x20V Tool）

What It Is

This is a 40V, 3.0Ah lithium-ion battery pack designed to power Worx 40V cordless lawn mowers, trimmers, blowers, and other outdoor tools. It’s a drop-in replacement or spare for the OEM Worx WA3580 battery.

Fitment & Compatibility

• Exact model match: Compatible with Worx 40V tools, including mowers WG180, WG280, WG380, WG580. Does not fit any 2x20V (40V total) tool that uses two separate 20V batteries.
• Check your tool’s battery port: This battery has the same slide-on interface as the original WA3580. If your tool uses a different shape (e.g., older WA3550 or WA3570), it may not lock in.
• Voltage & capacity: 40V nominal, 3.0Ah (108Wh). Works on any tool designed for 40V Worx batteries. Higher-capacity (4.0Ah, 5.0Ah) batteries also fit, but this one is lighter and cheaper.
• What to verify: Look at the battery model number printed on your current battery. If it’s WA3580, this is a direct swap. If it’s WA3550, WA3570, or WA3590, measure the slot width—some older models use a slightly different rail.

Key Things to Know

• Not OEM: This is an aftermarket battery. It may have slightly less runtime than the genuine Worx WA3580 (typically 10–15% less in real use).
• Charger compatibility: Works with any Worx 40V charger (e.g., WA3742, WA3880). Do not use with 20V chargers.
• Installation: No tools needed—slide onto the tool until it clicks. If it doesn’t click, check alignment; forcing it can damage the contacts.
• Common gotcha: Some users report the battery indicator lights may not match the OEM pattern exactly. Charge fully before first use (about 2–3 hours).

Should You Buy It

If you already own a Worx 40V tool and need a spare or replacement battery without paying OEM prices, this is a decent budget option. It’s best for light-duty use (small lawns, trimming) where runtime isn’t critical. For heavy mowing or all-day work, consider the genuine Worx WA3580 or a higher-capacity aftermarket pack.