KUNLUN 3.5Ah Replacement Battery for Worx 20V Tools - 2 Pack

In this review the KUNLUN 3.5Ah Replacement Battery for Worx 20V tools is evaluated for homeowners and hobbyists who need affordable, reliable power for cordless tools. The bottom line: this 2 pack offers a straightforward 3500mAh lithium-ion option that works across a wide range of Worx 20V and 40V (2x20V) tools, pairing with original chargers such as the WA3847 and WA3732 to deliver extended runtime without complicating the tool setup.

Key Features

• Direct compatibility: Replaces Worx 20V battery models like WA3525, WA3575 and WA3520 so users can swap batteries without modifying tools.
• 3500mAh capacity: Provides a balance of runtime and compact size for routine cutting, trimming or drilling tasks around the yard and workshop.
• Works with common chargers: Supports original WA3847 quick charger and WA3732 charger models so charging fits into existing workflows.
• Built-in protection: Integrated microchip with over-heat, over-voltage, over-current and over-charge protections reduces risk during use and storage.
• Two-pack value: Shipping two batteries gives users a spare for continuous work or staggered charging without buying single replacements repeatedly.

Who It's For

These batteries are a practical option for DIYers, landscapers and homeowners who already own Worx 20V or convertible 40V (2x20V) cordless tools and need a lower-cost replacement or extra battery to extend runtime. The two-pack format is especially useful when rotating batteries on longer projects or maintaining yard equipment throughout a weekend.

Users who require the absolute longest runtime available from high-capacity aftermarket packs or those with non-Worx chargers should consider other high-capacity or brand-specific batteries; this KUNLUN pack prioritizes compatibility and value rather than maximum capacity.

Pros & Cons

Pros

• Affordable two-pack that fits many Worx 20V and 40V tools for seamless swaps.
• Built-in safety protections and CE/FCC certifications for safer charging and storage.
• 3500mAh capacity is well suited to medium-length tasks without excessive weight.

Cons

• Not the highest capacity available, so heavy professional users may need larger cells for extended runtime.

Specifications

Brand	KUNLUN
Voltage	20V
Capacity	3500mAh (3.5Ah)
Battery Type	Lithium-ion
Package Quantity	2 Pack
Compatible Chargers	WA3847, WA3732 and similar Worx chargers
Protections	Over-heat, over-voltage, over-current, over-charge, over-discharge

Our Verdict

The KUNLUN 3.5Ah 2 pack is a sensible, cost-effective replacement for most Worx 20V users who want dependable runtime and full compatibility with existing chargers. It delivers good safety features and straightforward interchangeability, making it a strong value for homeowners and light professionals who need an extra battery without paying premium prices for higher-capacity alternatives.

Frequently Asked Questions

Will these batteries fit my Worx 20V tool?
Yes, the pack replaces common Worx 20V models such as WA3525, WA3575 and WA3520 and is designed for direct fit with those tools.

Can I use my existing Worx charger?
These batteries work with original chargers listed like the WA3847 and WA3732 and other compatible Worx 20V chargers.

Is there a warranty?
The manufacturer supports a 12-month limited warranty; contact seller support if you encounter issues.