DISCUSSION

SKIL PWRCORE 12 12V 4Ah Lithium Ion Power Tool Battery Pack with Fuel Indicator BY519801 Discussion

Janet Heath · 2026-02-28T12:59:57.000Z

Discuss the SKIL PWRCORE 12 12V 4Ah Lithium Ion Power Tool Battery Pack with Fuel Indicator BY519801 with the pros at the Tool Crib of the North. Share your thoughts about our Power Tool Battery Packs today.

SKIL Product Discussion

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SKIL PWRCORE 12 12V 4Ah Lithium Ion Power Tool Battery Pack with Fuel Indicator

SKIL PWRCORE 12 12V 4Ah Lithium Ion Power Tool Battery Pack with Fuel Indicator, large image number 2

SKIL PWRCORE 12 12V 4Ah Lithium Ion Power Tool Battery Pack with Fuel Indicator, large image number 3

SKIL PWRCORE 12 12V 4Ah Lithium Ion Power Tool Battery Pack with Fuel Indicator, large image number 4

SKIL PWRCORE 12 12V 4Ah Lithium Ion Power Tool Battery Pack with Fuel Indicator, large image number 5

SKIL PWRCORE 12 12V 4Ah Lithium Ion Power Tool Battery Pack with Fuel Indicator, large image number 6

SKIL PWRCORE 12 12V 4Ah Lithium Ion Power Tool Battery Pack with Fuel Indicator, large image number 7

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SKIL Brand Page

SKU# BY519801

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About this product

SKIL PWRCORE 12 12V 4Ah Lithium Ion Power Tool Battery Pack with Fuel Indicator

SKIL’s patented PWRCore 12 power tool battery pack is the industry’s most innovative lithium battery. Featuring an advanced temperature management system, this power tool battery pack delivers longer run time and extended battery life. Each cell is surrounded by revolutionary phase change materials that keep the battery cool during use, ensuring optimal performance and durability. With this cutting-edge power tool battery pack, you can power through any project with confidence and efficiency.

California Proposition 65 Warning.

Features

Compatible with all SKIL 12V tools in the PWRCORE 12™ system

Compatible with Skil PWR CORE 12 chargers

POWER ON THE GO—Plug in to the battery’s USB port wherever, whenever with PWRAssist™ mobile charging

ALWAYS KNOW CHARGE STATUS—Green LEDs on the battery show charge status, so you always know how much power is left.

Specifications

Brand Name

SKIL

Amp-hour

Assembled Weight (lbs)

1.01

California Proposition 65 Warning Required

Yes

Charger Included

Compatibility

All SKIL 12V tools in the PWRCORE 12™ system

Country of Origin

China

Number of Batteries Included

Package Contents

PWRCORE-12™ 4.0Ah Battery

Product Condition

New

Rechargeable

Yes

Restrictions

CA Prop 65

Warranty Type

2 Years Limited

Weight (lbs)

UPC

039725997371

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3 Comments

Janet Heath

February 28, 2026

Member since Jan 19, 2025

How do you charge this battery? I thought that’s what the USB port was for.? I bought a two amp one and it came with a charging cable like a cell phone, but I can’t figure out through these instructions. How I’m supposed to charge this thing do I have to buy another charger or can I just buy a double ended cell phone cable thing.

Hello, this battery requires a SKIL QC535701 or SC536501charger. The USB port is used when you want to have the battery provide power to a different item, like a cell phone. SKIL does make batteries that can be charged by using the USB-C port. Those batteries are red and are labeled as a USB-C battery.