will this battery work on the jawsaw?

Correct, this listing will be compatible with the WORX 20 volt JawSaw.

Will wa3578 replace a wa 3520

Yes, both batteries are 20 volt and are interchangeable, only with other 20 volt WORX tools.

Can I use this singular battery (with a power share device) along with a 2.0ah battery at the same time?

Yes, as long as the two batteries are 20V. Keep in mind the runtime will be based on the 20V 2Ah. We recommend using 2 batteries with the same amperage for best results and runtime.

Does the battery come with a charger (either normal or quick charge) or just the battery alone?

Just the battery. I bought a fast charger at the worx website.

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Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

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Worx WA3578 - PowerShare 20V 4.0Ah, Lithium Ion High Capacity Battery, Orange and Black

Worx WA3578 - PowerShare 20V 4.0Ah, Lithium Ion High Capacity Battery, Orange and Black

Product ID: 44208867

Details

Battery Capacity
4 Amp Hours
Battery Cell Composition
Lithium Ion
Brand
WORX
Number of Batteries
1 Lithium Ion
Recommended Uses For Product
Power Tool

⚡20V max power output

🔋4.0 Ah high capacity

⏱️Up to 2x runtime vs 2.0 Ah

Description

🔋 Power up your projects with twice the juice and zero compromise!

DOUBLE THE RUNTIME DOUBLE THE POWER - 4.0 Ah capacity delivers twice the work time of standard batteries—finish bigger jobs without pause.
LIGHTWEIGHT DESIGN BALANCED HANDLING - Compact yet robust battery keeps your tools agile and reduces fatigue during extended use.
FAST CHARGING LONG LASTING PERFORMANCE - MaxLithium cells charge quickly and resist memory effect, ensuring peak power every time you plug in.
UNIVERSAL COMPATIBILITY SMART CHARGING - Works seamlessly with multiple Worx chargers including quick and dual-port options for ultimate convenience.
CORDLESS FREEDOM WITH PROFESSIONAL STRENGTH - 20V lithium-ion tech powers all Worx 20V & 40V tools, ditching gas and cords for cleaner, quieter work.

The Worx WA3578 PowerShare 20V 4.0Ah Lithium Ion Battery offers professional-grade cordless power with double the runtime of standard 2.0 Ah batteries. Compatible across the Worx 20V and 40V tool platforms, it features MaxLithium technology for fast charging, long life, and no memory effect. Lightweight and balanced, it enhances tool handling while supporting multiple charger options, making it the ultimate upgrade for serious DIYers and pros alike.

Specifications

ASIN	B01N43NDL8
Amperage	4 Amps
Antenna Location	Power Tool
Battery Capacity	4 Amp Hours
Battery Cell Composition	Lithium Ion
Battery Cell Type	Lithium Ion
Battery Weight	600 Grams
Best Sellers Rank	#480,285 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #4,554 in Cordless Tool Battery Packs
Brand	WORX
Built-In Media	20V Max Li-ion Battery, 4.0Ah, Battery Indicator, Fits: WG160, 163, 255, 320, 321, 322, 323, 545, 546, 629, 778, 920, 921, 951 Series
Customer Reviews	4.7 out of 5 stars 9,500 Reviews
Global Trade Identification Number	00845534010350, 00845534016192
Item Dimensions	4.2 x 2.88 x 2.5 inches
Item Type Name	20V Max Li-ion Battery, 4.0Ah, Battery Indicator
Item Weight	1.4 Pounds
Manufacturer	WORX
Model Name	20V POWER SHARE 4.0 AH BATTERY
Model Number	WA3578
Number of Batteries	1 Lithium Ion batteries required. (included)
Recommended Uses For Product	Power Tool
Reusability	Rechargeable
UPC	845534010350 304067315054 845534033090 845534016192
Unit Count	1.0 Count
Voltage	20 Volts
Warranty Description	30 DAY Manufacturer Limited

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