DTK 20V 6.0Ah Battery Replacement for Worx 20V Battery WA3525 WA3578 WA3575 WA3520 20 Volt WA3520 WG151s WG155s WG251s WG255s WG540s WG545s WG890 WG891 Cordless Tool Battery (2 Packs)

What It Is

This is a 6.0Ah lithium-ion battery replacement for 20V Worx cordless lawn mowers and outdoor tools. It powers mowers, trimmers, blowers, and chainsaws that use Worx’s 20V Max platform.

Fitment & Compatibility

• Check your tool’s voltage requirement: This is a 20V battery, so it only works with 20V Worx tools, not 12V or 40V models.
• Verify model numbers: Compatible with Worx batteries WA3525, WA3578, WA3575, WA3520, and tools: WG151s, WG155s, WG251s, WG255s, WG540s, WG545s, WG890, WG891. Also fits many other 20V Worx tools—cross-reference your tool’s manual or battery compartment label.
• Physical fit: The battery uses the same slide-in mount as OEM Worx batteries. Measure your battery compartment: this unit is approx. 5.5 x 3.5 x 2.5 inches. If your tool has a recessed or angled bay, test fit is recommended.
• Aftermarket note: This is a third-party replacement, not made by Worx. It may not work with Worx chargers that have proprietary communication chips—check if your charger is a standard 20V Worx model (most are compatible).

Key Things to Know

• Capacity vs runtime: 6.0Ah is a high-capacity option—expect 50-100% longer runtime than a standard 2.0Ah battery, depending on tool load. Heavier use (e.g., thick grass) drains faster.
• Charging: Use a Worx 20V charger (e.g., WA3740, WA3760). This battery does not include a charger. Avoid using third-party chargers not rated for Li-ion.
• Weight: At ~1.5 lbs, it’s heavier than a 2.0Ah battery. This may affect balance on handheld tools like trimmers or blowers.
• Warranty: Most aftermarket batteries offer 1-2 year warranty vs. Worx’s 2-3 year. Check seller’s return policy for dead-on-arrival issues.

Should You Buy It

Buy this if you need a high-capacity battery for a Worx 20V lawn mower or outdoor tool and want to save money over OEM (which costs $80-100 for a 6.0Ah). It’s a solid value for light-to-medium use, but if you rely on your tool daily or need guaranteed compatibility with newer Worx chargers, stick with the genuine Worx battery.