Exmate 2 Pack 18V 2.5Ah Li-ion Battery Replacement for Worx WA3511 WA3512 WA3512.1 WA3523 WG151 WG151E WU287 WU381 WX163 Cordless Power Tools

What It Is

This is a two-pack of 18V 2.5Ah lithium-ion batteries designed to replace the Worx WA3511, WA3512, WA3512.1, WA3523, and other compatible models. It powers Worx cordless lawn mowers, string trimmers, blowers, and other 18V yard tools—essentially a drop-in replacement for original Worx packs that have worn out.

Fitment & Compatibility

Before buying, confirm your tool uses Worx’s 18V slide-on battery platform (common on WA-series packs). This battery is not cross-compatible with Worx 20V/40V/56V systems, or with other brands like Ryobi, DeWalt, or Black+Decker. Check your tool’s model number for compatibility: fits WA3511, WA3512, WA3512.1, WA3523, WG151, WG151E, WU287, WU381, WX163, and similar. Measure the battery compartment if unsure—these packs are standard Worx 18V slide-on size (approx. 5.1 x 3.0 x 2.4 inches). The 2.5Ah capacity is 25% larger than the original 2.0Ah, so runtime increases but physical dimensions remain identical.

Key Things to Know

• Aftermarket vs. OEM: This is a third-party replacement, not Worx-branded. It may use slightly different internal cells and charging circuitry—expect similar but not identical performance to genuine Worx batteries.
• Installation: Zero difficulty—slides on and clicks into place exactly like the original. No tools or modifications needed.
• Common gotcha: Some users report the battery indicator lights (if present) may not match Worx’s pattern. Also, aftermarket batteries sometimes charge slightly slower or run warmer under heavy load.
• Warranty: Typically 1–2 years from Exmate (check listing), vs. Worx’s 2–3 years on OEM. This is a trade-off for the lower price.

Should You Buy It

If you own multiple Worx 18V tools and want an affordable, ready-to-use battery pack without paying Worx’s premium (OEM WA3512 runs ~$60–70 each), this is a solid value. It’s best for light-to-medium yard work—mowing small lawns, trimming, or blowing. Avoid if you need maximum runtime for heavy commercial use or want the peace of mind of genuine Worx warranty and cell quality.