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CTEK Comfort Connect M10 (10.5-mm) Spare Battery Cable

CTEK Comfort Connect M10 (10.5-mm) Spare Battery Cable

Item # CTEK56329
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Permanently mount one of CTEK's additional battery-connection cables to each of your extra batteries for easy-access charging. 1-800-940-8924 to order CTEK Power Inc accessories and parts part number CTEK56329 or order online at Free expert support on all CTEK Power Inc products. Great prices and Fastest Shipping for CTEK Comfort Connect M10 (10.5-mm) Spare Battery Cable. Accessories and Parts reviews from real customers.
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  • Reviews (46)
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CTEK Power Inc Accessories and Parts - CTEK56329

  • Battery Charger
  • Cables
  • Spare Battery Cable
  • CTEK Power Inc

Permanently mount one of CTEK's additional battery-connection cables to each of your extra batteries for easy-access charging.


  • Can be permanently attached to battery using 10.5-mm eyelet terminals
  • Provides easy, plug-in charging access
    • Simply plug any 6V or 12V CTEK Comfort Connect charger into cable end
  • Makes quick, easy work of charging your extra batteries and maintaining your additional vehicles
    • Great for mowers, boats, seasonal vehicles, cars, vans, RVs, trucks, ATVs and motorcycles
  • Use this cable if your M6 cable's 6.4-mm eyelets (included with charger) are too small or as a spare to simplify your charging needs
    • M10 Cable is identical to 10.5-mm eyelet cable included w/ CTEK MULTI US 7002 charger
  • Also available in 2 additional eyelet sizes (sold separately)
    • M8 Cable (8.4-mm eyelets) accommodates large battery terminals
    • M6 Cable (6.4-mm eyelets) accommodates most battery terminals
      • Identical to 6.4-mm eyelet cable included w/ CTEK charger models US 800, UC 800 and MULTI US 3300


  • Application: all CTEK 6V and 12V Comfort Connect chargers
  • Model: 56-329 (M10)
  • Eyelet-terminal size: 10.5 mm
  • Battery cable length: 16"
  • Includes 1 battery-charging cable w/ 10.5-mm eyelet terminals
  • 5-Year warranty

Close-up of male and female connectors.

Attaching your charger to this extra cable is as easy as plugging in a toaster.

56-329 CTEK M10 Comfort Connect Battery Charger Cable Connector - 10.5-mm Eyelets

Video of CTEK Comfort Connect M10 (10.5-mm) Spare Battery Cable

Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.

Video Transcript for CTEK Power Inc Battery Chargers CTEK56329 Review

Today we're going to take a look at the CTEK comfort connect M10 spare battery cable. This cable can be currently attached to a battery using the 10.5 millimeter eyelet terminals, provides an easy plugin charging access right here. You can remove the cover. Simply plug this into an 6 volt or 12 volt CTEK comfort connect charger. Just to demonstrate, here's a 12 volt model multi-US 3300 charge by CTEK. If you notice, it has the quick connect comfort connect ends right here. It has a little, just push the orange lever down.

Basically, to make your connection, this cable, and just push it together just like that. If you push it enough, it'll lock it into place, and it won't disconnect. This will be attached permanently to your battery. To remove it, just push down on this, and you can pull it right out. This will stay attached to your vehicle.

Just put your cover in there to connect the connection points. This does make quick, easy work of charging your extra batteries and maintaining your additional vehicles. This is great to be used on boats, seasonal vehicles, cars, vans, RVs, trucks, ATVs, and even motorcycles. You can use this cable with you M6 cable, which is the 6.4 millimeter eyelets that usually come with the CTEK chargers are too small, or you can use this as a spare to simplify your charging needs. This M10 cable is identical to the 10.5 millimeter eyelet cable that's included in the CTEK multi-US 7002 charger. You can also get this cable in 2 additional eyelet sizes.

We do sell those separately. You can get it in the M8 cable, which is the 8.4 millimeter eyelets. This accommodates large battery terminals, and you can also get it in the M6 cable, which is the 6.4 millimeter eyelets that accommodate most battery terminals. Again, the application. This is for all CTEK 6 volt and 12 volt comfort connect chargers. Again, the eyelet terminal size on this is 10.5 millimeters.

The total battery cable length on this is 16 inches, and this part does include this one battery charging cable with the 10.5 millimeter eyelet terminals. That should do it for the review on the CTEK comfort connect M10 spare battery cable.

Customer Reviews

CTEK Comfort Connect M10 (10.5-mm) Spare Battery Cable - CTEK56329

Average Customer Rating:  4.7 out of 5 stars   (46 Customer Reviews)

Permanently mount one of CTEK's additional battery-connection cables to each of your extra batteries for easy-access charging.


Purchased to have leads on three batteries for RV while stored in winter since I have one charger. The items I received looked great but will NOT fit the charger cord. The charger has one hex shaped lead but the extensions have both round connectors and will not engage properly.
This is a HUGE waste of money!!!DO NOT Buy

Etrailer Expert

Jenny N.


You mentioned that the cables were not a fit and I had a question that I wanted to ask. Do you have a CTEK 6V and 12V Comfort Connect charger? If yes, can you tell me the model number?


Everything went well. Arrived on time, and packaged really well. Will order from e-trailer again.


The connector itself worked fine. I already had a CTEK charger but lost the quick connect cable. Cable was properly attached to existing charger, but the charger itself failed to keep the bike battery charged. Bought a different charger and it's now working just fine.


Didnt fit the application


Perfect product
Very quick shipping


Super pricing and fast shipping! Very happy I found etrailer on line! Thank you!


it's been a year and i'm still very happy with my purchase!


Good Product
Fast shipping


Very nice product packed very well.




Have been using the Ctek 3300 every winter in Canada, daily, since 2014, where it can get down to -40C. The connectors finally broke on the engine side at the wires of quick release from usage and the cold in start of 2022/23 winter and I eventually ordered these as replacements. Have used electrical tape and silicone tape to reinforce the wires at the strain reliefs, as well as spiral cord protectors for a bit more protections from UV and from chafing.
Was pleasantly surprised etrailer had these at a very reasonable price, including shipping to Canada via their shipping that handed off to Canada Post (Oct 26 order, Nov 08 delivered). These Comfort Connectors have the two round “sockets” with one corner on each socket, and fit the 2014 era Ctek 3300.

It would’ve been nice if the Ctek quick release to SAE adapter had been available


Price was right, packaged well and on time. What’s not to like?


These battery connectors are great. You can save a world of time by permanently connecting one to each of your batteries and then it is a simple quick connect to a Ctek charger to keep any battery in top shape. Perfect for seldom used battery storage or just to keep your vehicle battery in perfect condition.


Product arrived on time in great shape. I actually bought it for parts to repair another similar unit that I have but it worked out fine.


Ordered this item to go with the CTEK battery charger I also ordered. Now I don't have to pop open the hood to connect the CTEK charger to the battery. The items were shipped quickly even with the poor weather conditions we were enduring. I've always liked their price and assistance available for merchandise purchased thru etrailer. Kudos for the staff at


Very convenient, put one of these on each of my tractors for simple hookup of the CTEK charger. Excellent accessory.


Works great for a permanent charge point on marine batteries.
Top quality.


Product arrived as described, A+


These comfort cables make keeping your battery in top shape very convenient.


I have used CTEK products before and I am very pleased with its use during the winter months for battery management. This recent order is my second CTEK and I plan not only to use it to maintain battery levels on my C7 corvette , but on other systems as well. Your price and shipping offers are excellent and I would recommend your service to anyone interested in battery chargers.


perfect to plug in my car battery charg er


We really like the CTEK battery charger. In fact, we now own 6 of them.


Thank you for your promptness and delivery - it was expedient and very satisfactory - if I need a purchase, you shall be first to come to mind you are the kind of people I like to do business with.
Thank you ~ Dan Dietz


I hooked them up to my motorcycle, 3 wheelers, and zero turn mower, now it will be easier charge my batteries, thanks to the comfort hook ups.

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    I Contacted CTEK to be sure that I could give you the correct information on charging your 4 Optima Yellow Top batteries. He said that as long as the batteries are connected in parallel, still a 12 volt system, you can use the CTEK MULTI US 7002 12-Volt Universal Battery Charger w/ Pulse Maintenance and Backup Power, item # CTEK56353, to charge all 4 batteries at the same time. He also stated that the CTEK MULTI US 7002, is the charger that they recommend for the Optima Yellow Top and is...
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