Search  for anything...

WNI 4 Gauge 40 Feet Black 4 AWG Ultra Flexible Welding Battery Copper Cable Wire - Made In The USA - Car, Inverter, RV, Solar

  • Based on 3,883 reviews
Condition: New
Checking for product changes

Buy Now, Pay Later


As low as $11.68 / mo
  • – 6-month term
  • – No impact on credit
  • – Instant approval decision
  • – Secure and straightforward checkout

Ready to go? Add this product to your cart and select a plan during checkout. Payment plans are offered through our trusted finance partners Klarna, PayTomorrow, Affirm, Apple Pay, and PayPal. No-credit-needed leasing options through Acima may also be available at checkout.

Learn more about financing & leasing here.

Selected Option

Free shipping on this product

This item is eligible for return within 30 days of receipt

To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.

To initiate a return, please visit our Returns Center.

View our full returns policy here.


Availability: In Stock.
Fulfilled by WindyNation

Arrives May 19 – May 20
Order within 6 hours and 34 minutes
Available payment plans shown during checkout

Size: 4 Gauge


Color: 40 Ft Black


Features

  • Simply use the variation options to (1) select the cable gauge size you want and (2) select the insulation color(s) and cable length you want.
  • 100% Made in the USA cable. Ultra-flexible, SAE J1127 approved, PURE copper cable manufactured and annealed to ASTM standards.
  • Please see the photo gallery for a detailed specification chart.
  • Rated up to 600 volts, operating temperature: -58F to +221F, flexible, solvent repellent, abrasion resistant EPDM insulation.
  • WindyNation Power-Flex welding/battery cable is a premium grade, PURE copper cable manufactured to the highest standards right here in the USA!

Color: 40 Ft Black


Brand: WindyNation


Material: Copper


Number of Cable Strands: Multi Strand


Voltage: 600 Volts


Is Discontinued By Manufacturer ‏ : ‎ No


Package Dimensions ‏ : ‎ 4 x 3 x 3 inches


Date First Available ‏ : ‎ November 8, 2018


Manufacturer ‏ : ‎ WindyNation


Best Sellers Rank: #535 in Automotive (See Top 100 in Automotive) #1 in Welding Cable


#1 in Welding Cable:


Customer Reviews: 4.8 4.8 out of 5 stars 3,883 ratings


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: May 19 – May 20

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

Learn more about financing & leasing here.

Top Amazon Reviews


  • Very flexible for its gauge
Size: 6 Gauge Cable Color: 10 ft Black +10 ft Red
Needed this for upgraded car alternator install, found large gauge wire very flexible, and glad to have both red and black. Not able to find this gauge size in small amounts at local stores. Very pleased with this selection for my project also ordered large crimp lugs and shrink tubing.
Reviewed in the United States on October 26, 2023 by TJB

  • High quality.
Size: 4/0 Gauge Color: 5 Ft Black + 5 Ft Red
Way too expensive, in my honest opinion, but this is the sexiest cable I've ever seen. Super beffy, yet still flexible. Will cost you a fortune if not a short run.
Reviewed in the United States on October 21, 2023 by Ian Caudell

  • Very flexible.
Size: 6 Gauge Color: 10 Ft Black + 10 Ft Red
Used for battery cable extension.
Reviewed in the United States on October 23, 2023 by Jim E

  • Core size and flexibility
Size: 2/0 Gauge Color: 20 Ft Black
Doing a solar install, needed flexible fine strand wire that was dual rated. Yes - welding cable but it is dual rated for battery / solar. The wire filled the 2/0 lugs. Very pleased.
Reviewed in the United States on September 26, 2023 by Stan

  • Good wire
Size: 2 Gauge Color: 20 Ft Red
Super fast shopping. Very flexible. I have ordered twice . Running wires for a 1200 watt inverter.
Reviewed in the United States on October 1, 2023 by Chase

  • Good product
Size: 6 Gauge Color: 10 Ft Red
Nice good wire 👍
Reviewed in the United States on October 4, 2023 by Daniel gill

  • Nice quality wire.
Size: 6 Gauge Color: 20 Ft Red
Very nice quality and appears to be exactly as stated. FYI - for anyone that has not used both solid copper wire like this and copper clad aluminum wire -- the difference is night and day. This wire you can smooth out, slide an electrical connector over, and crimp without much difficulty. You bend the wire and it stays put. The cheaper copper clad aluminum wire does not stay put when you smooth it out -- it bounces back making it harder to stuff into a crimp connector. I've used the cheaper clad wire a couple times when I rewired light fixtures that had the cheaper wire -- and when I tried to twist the wires together they just bounced back making the end of the wire look like a pin cushion. This is the good stuff. ... show more
Reviewed in the United States on July 18, 2023 by Tony Jansen

  • Great as always
Size: 4 Gauge Color: 5 Ft Black + 5 Ft Red
I only buy my car audio power and grounds from this seller, no bs products that are honest in the description and reasonably priced. You can pay more for some lime green nonsense from a big car audio company but I doubt they match the strand count in these wires and costs alot more. Highly recommended. I have bought at least 4 times from them, always fast and in perfect condition. ... show more
Reviewed in the United States on August 17, 2023 by Amazon Customer

Can't find a product?

Find it on Amazon first, then paste the link below.