bing tracking image
  1. Accessories and Parts
  2. CURT
  3. Trailer Breakaway Kit
  4. 12V Battery
Replacement 12-Volt Battery for Curt Soft Trac I and II Trailer Breakaway Kits

Replacement 12-Volt Battery for Curt Soft Trac I and II Trailer Breakaway Kits

Item # C52023
Our Price: $16.74
Accessories and Parts
Shipping Weight: 3 lbs
Add to cart
In Stock
zoom in icon
slider vertical icon
zoom out icon
Comment field cannot be left empty.
Name field cannot be left empty.

Thank you! Your comment has been submitted successfully. You should be able to view your question/comment here within a few days.

Error submitting comment. Please try again momentarily.

Product Images

Need help with installation?
Locate installers near me
Replaces the 12-volt battery that came with your Curt breakaway kit. This battery powers your trailer's electric brakes in the event that your trailer accidently disconnects from your tow vehicle. 1-800-940-8924 to order CURT accessories and parts part number C52023 or order online at Free expert support on all CURT products. Great prices and Fastest Shipping for Replacement 12-Volt Battery for Curt Soft Trac I and II Trailer Breakaway Kits. Accessories and Parts reviews from real customers.
  • All Info
  • Reviews (66)
  • Q & A (0)
  • Videos (2)
  • Photos

CURT Accessories and Parts - C52023

  • Trailer Breakaway Kit
  • 12V Battery
  • CURT

Replaces the 12-volt battery that came with your Curt breakaway kit. This battery powers your trailer's electric brakes in the event that your trailer accidently disconnects from your tow vehicle.


  • Sealed lead-acid battery replaces the battery that came with your trailer breakway kit
    • Works with Curt Soft Trac I (C52040 or C52041) and Soft Trac II (C52028 or C52026) breakaway kits
  • 5 Amp-hours
  • 12 Volt

1250 BWG Replacement 12V Battery for Curt Soft Track 1 and 2 Break Away Systems

California residents: click here

Video of Replacement 12-Volt Battery for Curt Soft Trac I and II Trailer Breakaway Kits

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

Video Transcript for Curt Soft Trac Trailer Breakaway Kits Replacement 12-Volt Battery Review

Hey everybody, Ryan here at ETrailer. Today we're gonna be checking out the Curt replacement 12 volt battery for trailer breakaway systems. Whenever you go to, you know, fix up your trailer, it kind of seems like one thing leads to another, and that's the case with ours, today. You know, having a breakaway battery, that's functional, is critical, because this is gonna provide the trailer brakes and power in the event of an unlikely disconnect. So if the trailer comes unhooked, your breakaway panel gets pulled, this will send power to the brakes, kind of slowing everything back down. And with these little batteries, you know what, a lot of times what ends up happening, the trailers sit forever, the battery loses a charge, won't really take a charge, you know, it's just kind of, at it's end, or people wire 'em up wrong or a combination of both.

And that's kind of what happened. Our trailers sat forever, they need to go to use it, having some wiring issues coming to find out, the way they had it wired. It wasn't actually charging their existing battery, so it was bad. And so instead of having to deal with getting a whole new box and everything else, if all components are in good shape, could always just replace the battery, and get you up and going again. This is gonna be a sealed lead acid type battery, and 12 volts and it's gonna be a direct replacement, for the Curt Soft-Trac 1, and Soft-Trac 2 trailer breakaway systems, but also many others.

You know, these are all pretty generic, for the most part. So, the one we're replacing today, you have a different brand, system there, but this is gonna work with it. So really as long as the measurements, you know, as long as this fits and as long as the voltage and ratings are the same, it's gonna work. This is a 5 amp power rating. And to make sure it'll fit, actually, in your breakaway box terms of the height, it's gonna be four inches, be three and a half inches wide, and two and three quarters of an inch deep.

So that's a really common size, for the majority of the boxes, out there. Some are bigger, which we do have the larger batteries, if that's the one you need, or if your whole system is kind of just, took a turn for the worst there and you need to replace everything, or if that's what you'd rather do, we carry a lot of those kits here at ETrailer as well. If you're unsure if your original battery's bad, it's pretty easy to figure out. You can always take a voltage meter, and check it that way, or you can do a real simple test, too. And that is get your trailer's wheels, up in the air, and they should spin freely.

And if you we're to pull your breakaway switch, that should, you know, tell the battery to send power to the brakes and stop 'em. We have kind of a cool breakaway switch. It has a LED indicator light on there, that'll tell us if we're getting power. So right now I have the old battery hooked up, and if we pull that pen we should see a light illuminate, which we don't, so we know, no battery power is coming through here, and not being sent back to the brake. So we'll pop our new one in, and see if that makes a difference. To get our old battery removed, it's super easy. I mean these things just have little spade terminals on 'em, that you pop off and ours are still in good shape. If yours are chewed up or anything, you can always replace 'em, but really nothing to it here. You know, you simply just plug that right in, like that, and put it back into your box. So, get that snapped in there, and then if you start to take a look at our breakaway switch. Put that inside. Now with the new battery, when we pull this pin, we should get power. So pull that out. We see that, it lit up red, you know, power's going through there and back to the brakes. So, really, not a whole lot to it. You know, this is gonna be a great direct replacement option for the majority of the breakaway boxes out there. And a really important component, because, you know with this, if your battery's dead, it always seems like when an accident happens, it happens at the worst time. If your battery's dead and the trailer comes disconnected, the brakes aren't gonna turn on, and you know, that's gonna prevent you, from getting things kind of back under control. So, making sure that this is up and going, and has a proper voltage is gotta be critical, and you're gonna thank yourself a lot. You know, if you we're to come across that situation, where the trailer comes disconnected. Other than that, at the end of the day, not really a whole lot to it, you know, like I said, as long as this'll fit in your breakaway box, and the ratings are the same as your original battery, this is definitely gonna get the job done. And really important part to your whole trailer's braking system. You know, because whenever, if a trailer, if your trailer did come disconnected, you're gonna want the brake supply and help get things back under control. So by keeping this replaced, knowing that it's good. It'll definitely give you a little more peace of mind whenever you're towing down the road. And that'll finish up our look at of the current replacement 12 volt battery for trailer breakaway systems.

Customer Satisfaction Score:

Customer Reviews

Replacement 12-Volt Battery for Curt Soft Trac I and II Trailer Breakaway Kits - C52023

Average Customer Rating:  4.9 out of 5 stars   (66 Customer Reviews)

Replaces the 12-volt battery that came with your Curt breakaway kit. This battery powers your trailer's electric brakes in the event that your trailer accidently disconnects from your tow vehicle.


The battery I ordered came right on time and it's a perfect fit. The battery is for the brakes on a tow dolly, not an easy thing to find. Very satisfied with the service from etrailer.


This is a product that I hope I never have to use. The battery was an exact replacement for my old one. The vendor service was very good, and installation of the battery and charger was easy with the instructions provided.


We use many of these batteries each year in our fleet. Never from a failed part just in general maintenance . These batteries are very common on small trailers with break away locking brakes. This is a must have item. The cost is perfect. The ordering and delivery on every item we purchase is right on time.


I needed a new battery for my breakaway box and called local parts store where I was told they would have to look at it and order one. I was ordering a spare tire anyway and etrailer’s prices couldn’t be beat so I ordered it here. Arrived quickly in the estimated time, carefully packaged, perfect replacement. Will shop here first from now on.


Product is as expected. Arrived fully charged wrapped in plastic and packed with packing paper in a box. Purchased to replace the unrecoverable battery for my trailer brake controller.


Replace the original battery with this one has worked great. I have purchased several items from etrailer and have been happy with all of them.

James S.


Battery is still working after a year and all the products I have bought I have been happy with.


Great battery. I used in my trailer and now I’m using it in my garage for testing



Still going strong after a year. On the trailer in the Summer and in my shop in the Winter for wiring projects troubleshooting


If you own a trailer, should be your first choice for parts and technical advice. The product support department stands behind their product. They send specs and install info for everything you order and in the event you still have a problem, they do not rest until your problem is resolved. They are awesome folks!


Good battery, holds it's charge very we ll.



Still performing well.


Less then half the price at batteries plus store. Work fine on my trailer over the year, remember to test your break away trailer brake once awhile. Thanks again


Direct replacement on my cargo trailer. No problems and works as advertised.


I love this site. They are easy to order from, have great prices and fast shipping!
Battery works as described!
I bought a replacement wheel & tire from them previously and they had the best price around!


the last time i replaced this battery, you could buy it at TSC. Not anymore, you have to but the whole brake a way kit. so yes just what i need to keep my towing safe.


This was just one of the several orders that I have placed where etrailer goes above and beyond to meet the expectations of its customers - Job well done by entire staff. "KUDOs"


Etrailer surpassed my expectations! The products arrive so fast and installation was a breeze! Great product!


Works great so far and runs all the lights and water pump in my horse trailer.


Just what I was looking for. OEM replacement battery fit like a glove with no modifications. Has worked great.


Great website easy to order and pay. Quality products the same stuff that was on my trailer originally.


Exact replacement for what I needed. Easy to order and it arrived on time. I was also able to track the shipment.


Once again..very happy with the service provided by etrailer, great selection and fast delivery.


Exactly as advertised. Perfect fit and very fast delivery.

John W.


Still working as advertised.


Pleased. As described.


Just what I needed! Perfect match. Thanks E-Traileras always spot on.


The product continues to perform as expected after 1 year in service. Thank you.


Great replacement

Show More Reviews

See what our Experts say about this CURT Accessories and Parts

Do you have a question about this Accessories and Part?

Info for this part was:

Employee Lindsey S
Edited by:
Lindsey S
Employee Jeff D
Installed by:
Jeff D
Employee Cole B
Installed by:
Cole B
Employee Randy B
Installed by:
Randy B
Employee Ryan G
Installed by:
Ryan G
Employee Jameson C
Expert Research:
Jameson C
Employee Adam R
Expert Research:
Adam R
Employee Joshua S
Video Edited:
Joshua S
Employee Kathleen M
Video by:
Kathleen M
Employee Chelsea B
Written by:
Chelsea B
Employee Wilson B
Updated by:
Wilson B
Employee Kristina F
Updated by:
Kristina F
Employee Isabelle B
Updated by:
Isabelle B

At we provide the best information available about the products we sell. We take the quality of our information seriously so that you can get the right part the first time. Let us know if anything is missing or if you have any questions.