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Skil

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

  • Based on 772 reviews
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Availability: In Stock.
Fulfilled by Amazon
Arrives Thursday, Apr 23
Order within 8 hours and 57 minutes
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Style: 12V 4.0Ah Battery_USB-C


Features

  • 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
  • COMPATIBLE WITH USB-C CHARGERS - Charge battery with any SKIL 12V charger (sold separately) or any household USB-C charging block

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.

Brand: Skil


Color: Red


Product Dimensions: 3.74"D x 2.8"W x 2.48"H


Item Weight: 0.61 Kilograms


Output Voltage: 12 Volts


Output Voltage: 12 Volts


Input Voltage: 12 Volts


Connector Type Used on Cable: USB-C


Number of Ports: 1


Item Dimensions D x W x H: 3.74"D x 2.8"W x 2.48"H


Item Weight: 0.61 Kilograms


Specification Met: FCC, UL


Color: Red


Brand: Skil


Mfr Part Number: BY5040A-00


Global Trade Identification Number: 13


UPC: 195532201619


Manufacturer: Skil


Model Number: BY5040A-00


Item Type Name: SKIL PWRCORE 12 4.0Ah 12V USB-C Battery


Built-In Media: (1) Battery Jacket;(1) USB C Cable;, (1) SKIL PWR CORE 12™ 4.0Ah 12V USB-C Battery;


Unit Count: 1.0 Count


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Thursday, Apr 23

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

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
  • PayTomorrow Financing
  • Financing through Apple Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Similar Products

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
    • 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
    • Affordable and lasts
SUPER EXCITED to have found this as I have many tools that needed this and the box stores dont carry
Reviewed in the United States on February 28, 2026 by Dilly Dawgs Mom
    • durable
Good product
Reviewed in the United States on February 15, 2026 by Fabián Alberto Ruiz Camargo
    • Packs a little more punch!
Good battery, gave a little more kick to my skil pwrcore12 3/8 impact wrench and was able to remove lug nuts from my Yukon (which I don't recommend, was just for testing purposes) not to say that there's anything wrong with the 2ah but if you can afford it get the 4ah. Also like the type-c connection so I don't need a base charger. ... show more
Reviewed in the United States on June 6, 2025 by Arthur Martinez
    • The essential accessory for Skil tools
The media could not be loaded. I purchased this 4Ah battery to complement a Skil tool kit I gave my husband for Christmas. The original kit came with a 2Ah battery, and while it worked fine for quick tasks, he constantly complained that the charge ran out too quickly on longer projects. The change has been incredible! With this new 4Ah battery, the tool not only lasts twice as long, but it also feels a bit more consistent in constant use. Now he can finish his jobs without having to take mandatory breaks to recharge. What we liked most: Autonomy: Ideal for medium and large DIY projects. Compatibility: Fits perfectly in the original tool and charger. Performance: You can tell it's a quality brand and the power is consistent. Without a doubt, it was an excellent investment. If you have 2Ah tools and feel like you're falling short, this 4Ah one works great. Highly recommended! ... show more
Reviewed in the United States on January 19, 2026 by E.T.T.
    • Good deal !
Good price with quick delivery!
Reviewed in the United States on March 17, 2026 by Chris Webb
    • Lasts much longer than 2.0Ah
Lasts alot longer than the 2.0Ah batteries. Convenient that it charges by USB C. Worth buying even though they are a bit more money
Reviewed in the United States on March 11, 2026 by Eli Par

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