Exmate 18V 2.5Ah Li-ion Replacement Battery for Worx WA3512 WA3511 WA3512.1 WA3523 WG151 WG151E WU287 WU381 WX163 Cordless Tools Battery

What It Is

The Exmate 18V 2.5Ah Li-ion battery is a direct replacement for Worx WA3512, WA3511, and WA3521 series batteries. It powers Worx cordless lawn mowers (like the WG151/WG151E), string trimmers, hedge trimmers, and other 18V Power Share tools.

Fitment & Compatibility

• Check voltage: This is an 18V battery. It will not work with Worx 20V, 40V, or 56V tools.
• Model match: Fits Worx WA3512, WA3511, WA3512.1, WA3523, WG151, WG151E, WU287, WU381, WX163. Also compatible with all Worx “Power Share” 18V tools (check your tool’s battery port shape).
• Physical size: Same footprint as the OEM battery. Measure your original battery: L x W x H about 5.1” x 3.5” x 2.6”. It slides into the same slot.
• Aftermarket vs OEM: This is a third-party replacement, not Worx-branded. It uses the same connector and voltage, but may not have the same internal cell quality or BMS (battery management system) as genuine Worx.
• Charger compatibility: Works with any Worx 18V charger (model WA3730, WA3740, WA3750, etc.). Do not use with 20V or higher voltage chargers.

Key Things to Know

• Capacity: 2.5Ah vs OEM’s 2.0Ah – slightly more runtime (about 25% more for light loads like trimmers, less gain for mowers).
• Installation: None. Just slide onto the tool until it clicks. No tools or modifications needed.
• Common gotchas: Some users report the battery fits tightly on certain tools (especially older mowers). If it doesn’t click fully, check the slide rails for debris. Also, this battery may not charge if fully drained – try a brief “jump” charge on a known-good Worx battery first.
• Performance: Adequate for small to medium lawns (under ¼ acre) on a single charge with a 18V mower. Not built for heavy continuous use in commercial settings.

Should You Buy It

Buy this if you need a budget-friendly spare for occasional light-duty use—trimming, edging, or mowing a small lawn. It’s a decent value for the price, but for daily heavy mowing or long runtime, stick with the genuine Worx 2.5Ah or 4.0Ah battery.