

CTEK (56-304) Comfort Connect Extension Cable, 8.2 Feet
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Steve W.
Greater than one weekCable is good but could use a cable jacket over the wires. Im using it outdoors in the New England winter. What I ended up doing is making a Jacket out of irrigation tubing to protect it from the elements.
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Joe Stanaland
Greater than one weekThis worked perfectly for our seldom used 2002 Mercury Mountaineer which is only driven on those rare occasions when we have our other car in the shop.
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Laurie Hess
07-06-2025Its an extension cord, does its job
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Glen E Thomas
> 3 dayBatteries die in the cold and rainy weather, my old charger had 3 foot leads and a 6 foot AC cord that required me to try to waterproof the cord and charger during use. This extension cable allows me to place the charger in the garage and charge the batteries while the cars are in the driveway. Perfect solution and addition to a great battery charger
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SRP
Greater than one weekThis was purchased in order to store a car in the garage during the winter. Performed flawlessly. Had zero issues for almost 4.5 continuous months. Used it in conjunction with the CTEK (56-158) MULTI US 3300 + the CTEK (56-263) Comfort Connect Cig Plug.
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J. MacLeod
> 3 dayWorks for me flawlessly for about 4 to 5 months when it’s suddenly stopped working. After reading several other posts and questions on this product and see if like you have a certain type of mechanical grease you apply it to the metal ends, and the project will start working again flawlessly. If you don’t own mechanical grease, then that’s another added cost. They should’ve included a small tube of the mechanical grease with this product or the original product instead of getting mechanical grease for this product. I went ahead and got another type of extension cord for battery minders, that’s attached to my vehicle, which worked flawlessly for several years without meat of mechanical Greese. I will save this product in a drawer, hoping to get mechanical grease one day until then it will not work. Only way I would increase my rating from a two star to a five star would be if they do include some type of mechanical grease which is needed or put in bedded lettering. That should only be used indoors.
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2016LBRZ06
05-06-2025CHARGE UP THE VETTE, AT LEAST, ONCE A MONTH!! DUE TO THE WALL SOCKET LOCATION IN MY GARAGE, DRAPING POWER CORDS ALL OVER JUST TO USE MY CTEK CHARGING UNIT MADE THE FLOOR UNSAFE FOR ME TO WALK AROUND ITEMS ALREADY PLACED ON THE FLOOR. I PURCHASED TWO OF THESE CORDS AND WAS ABLE TO SAFELY LOCATE THE CHARGING UNIT AND CORDS SO THAT WHEN I CHARGE BIG RED, ITS SAFE FOR ME TO MOVE ABOUT IN MY GARAGE. THIS IS A GREAT PRODUCT AND AT A GREAT PRICE.
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Clara Steuber
> 3 dayThe product is perfect for keeping the battery on my 599 fully charged. Anyone who knows; you don’t want a dead battery on a 599. Easy to attach clips to battery for temporary use. But for long term use the hard wiring is easy to attach to the battery using a wrench. Then just plug it in and leave it alone. Very easy disconnects allows for driving without accessing the battery. I also bought the 8’ extension for extra length around the exhausts and I have the unit wall mounted using the mounting holes on the unit. I have my other Ferrari’s on theses units as well. I highly recommend them for use with the high energy draining modern Ferrari’s. Plus, they extend battery life significantly.
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Ray
> 3 dayThis cable extension is a must have if you have a late model corvette and you want to be able to close the rear hatch completely. The cable that comes with the Ctek charger is to thick and causes the rear trunk on the corvette to pop up and I think long term storage on fiberglass that would be bad. The extension cord lies flat and you can actually slide it in the gap even with the rear hatch fully closed. Well worth the good price.
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Dave B.
> 3 dayWorks as it should. The extra length allows more options to hook up the ctek.