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Skil

SKIL PWRCORE 12 4.0Ah 12V USB-C Battery-BY5040A-00

Based on 91 reviews
Condition: New
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$69.00
Holiday Deal · 23% off was $89.99

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This item's return window has been extended for the holiday season: FREE refund/replacement until Jan 31, 2027

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Availability: In Stock.
Fulfilled by Amazon
Arrives Monday, Nov 16
Order within 21 hours and 36 minutes

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At a glance

Condition
New
Style
12V 4.0Ah Battery_USB-C
Model
BY5040A-00
Dimensions
3.74"D x 2.8"W x 2.48"H
Color
Red
Output Voltage
12 volts
Specification Met
FCC, UL
Works with
Personal devices, USB-C compatible devices

Features 5

  • 60W USB-C PD 3.0 PORT - Up to 12X higher power than USB-A to power a wide range of devices
  • TWO-WAY RAPID CHARGING - Charge the battery or personal devices via the USB-C port
  • LED FUEL GAUGE - Displays current battery charge status in 25 percent increments
  • ONE BATTERY, MANY TOOLS - Compatible with all 12V products in the SKIL PWR CORE 12 system

Description

Compatible with all SKIL 12V tools in the PWR CORE 12™ system, the compact, lightweight PWR CORE 12™ 4.0Ah 12V USB-C Battery features two-way rapid charging via USB-C, allowing you to charge the battery or personal devices with its integrated USB-C port. Its USB-C PD 3.0 port delivers up to 12X higher power than SKIL batteries with USB-A ports to power a wide range of devices or fast charge them when you’re on-the-go. Its LED fuel gauge displays current battery charge status in 25 percent increments. When it’s time to recharge, this 4.0Ah battery will charge on any SKIL 12V charging dock as well as any household USB-C charging block.

Specs 19

Brand Skil
Color Red
Product Dimensions 3.74"D x 2.8"W x 2.48"H
Output Voltage 12 volts
Specification Met FCC, UL
Input Voltage 12 volts
Connector Type Used on Cable USB-C
Number of Ports 1

Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Monday, Nov 16

Yes, absolutely! This item's return window has been extended for the holiday season: FREE refund/replacement until Jan 31, 2027.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • Zip Pay in 4
  • Financing through Apple Pay
  • Financing through Google Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

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Top Amazon Reviews

Awesome Power & Runtime
The SKIL PWRCORE 12 4.0Ah 12V battery delivers excellent runtime in a compact size. If you're running a Skil PWRCore 12 Brushless 12V 5-1/2" Circular Saw, or the PWRCore 12 Compact Brushless Reciprocating Saw, these are a must have to not eat the smaller 2.0Ah batteries. The built-in two way USB-C charging is a great bonus feature, and I've used it to charge my phone while out and about several times. The battery gauge makes it easy to monitor charge levels. Solid performance and a great upgrade for any SKIL 12V setup. ... show more
Reviewed in the United States on February 14, 2026 by Chris Thomas
Great battery for a good tool line.
These feel well made, and hold a modest charge. The only tool I have that drains it too fast is the led tower light. I would recommend this.
Reviewed in the United States on July 21, 2026 by Lost in translation
Great battery
Very good battery, I needed it to use my jigsaw because because my 2 ah battery keeps dying too quickly. This one did a better job. Is so nice that I can also use it as a power bank to charge your phone in case of an outage.
Reviewed in the United States on June 4, 2026 by ury gomez
Nice to have
Love these batteries. I use the usb function constantly to charge phone, ipad, charge outdoor camera right where they are mounted. They charge quickly and run long time unless using a tool that requires large amount of power.
Reviewed in the United States on February 26, 2026 by joe coulter
Great buy
Great battery. Way better than the 2AH battery.
Reviewed in the United States on June 1, 2026 by JESSE GALAN
Good customer service
Bought it Feb 2026 it's already dead and gone, but fortunately I registered it and SKIL is sending me another one. Good customer service
Reviewed in the United States on August 30, 2026 by Carlos Garcia
Battery won’t charge
Battery started not charging after 6 months
Reviewed in the United States on September 16, 2026 by Andrew
Great gift for a friend.
This was mostly a gift for a friend. I use it too so i can put some of my experience into this review. For the small tools like the skillsaw and the Light stand, it does make a difference. The price is decent but a little too high for a 12v battery but i guess its because of the USB C advantage. Wish you guys can make a 6 ah. 4 ah capacity is good but in the “okay” range. Also, the charge throttle of 3 amps is sort of slow, any future ideas for a faster charger? ... show more
Reviewed in the United States on April 25, 2026 by Antonio Reyes
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