bing tracking image
  1. Trailer Breakaway Kit
  2. Tekonsha
  3. Kit with Charger
  4. Top Load
Tekonsha Push-To-Test Trailer Breakaway Kit with Built-In Battery Charger - Top Load

Tekonsha Push-To-Test Trailer Breakaway Kit with Built-In Battery Charger - Top Load

Item # 50-85-313
Our Price: $70.64
You Save: 36%
Trailer Breakaway Kit
Orders above $99 qualify for Free Shipping
Shipping Weight: 5 lbs
In Stock
Tekonsha Kit with Charger - 50-85-313
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

In Use/Installed

Customer Photos

Need help with installation?
Locate installers near me
Breakaway system with built-in charger is designed to bring a trailer safely to a stop by activating its electric brakes should it become disconnected while being towed. Push-button tester lets you know if the rechargeable battery is fully charged. Great Prices for the best trailer breakaway kit from Tekonsha. Tekonsha Push-To-Test Trailer Breakaway Kit with Built-In Battery Charger - Top Load part number 50-85-313 can be ordered online at or call 1-800-940-8924 for expert service.
  • All Info
  • Reviews (135)
  • Q & A (0)
  • Photos
  • Why etrailer?

Tekonsha Trailer Breakaway Kit - 50-85-313

  • Kit with Charger
  • Top Load
  • Tekonsha

Breakaway system with built-in charger is designed to bring a trailer safely to a stop by activating its electric brakes should it become disconnected while being towed. Push-button tester lets you know if the rechargeable battery is fully charged.


  • Breakaway system activates your trailer's electric brakes if the trailer disconnects from the tow vehicle
  • Push-to-test battery feature offers fast and easy battery testing
    • Test button indicator with LED lights clearly displays battery status
      • Green = charged (12.8 volts or higher)
      • Yellow = charging
      • Red = low battery
  • Built-in charger automatically refuels the battery
    • Float Mode maintains voltage while you tow without overcharging to prolong battery life
    • Smart Adjust automatically switches to Float Mode when battery is fully charged
  • Top-loading case is easy to access from above
    • Polymer construction protects battery from moisture and debris
    • Mounting hardware not included
  • Lockable lid deters theft (padlock sold separately)
  • Breakaway switch installs on your trailer's frame - drilling is required
  • Department of Transportation (DOT) compliant
  • 12-Volt rechargeable battery is included


  • Application: single-, tandem-, and triple-axle trailers with electric brakes
  • Case dimensions: 5" long x 4-1/8" wide x 4" tall
  • Mounting hole spacing:
    • 5-11/16" From center of hole to center of hole horizontally
    • 1" From center of hole to center of hole vertically
  • Battery capacity: 5 amp-hours
  • Breakaway switch length: 7-1/2"
  • 1-Year limited warranty

Note: A breakaway system is required by law in most states for trailers that are equipped with electric brakes and have a GTW of at least 3,000 lbs.

5085313 Tekonsha Push-To-Test Breakaway Kit with Built-In Battery Charger - Top Load - 5 amp/hrs

Same as Hydrastar HS496-82

Installation Details 50-85-313 Installation instructions

California residents: click here

Customer Satisfaction Score:

Customer Reviews

Tekonsha Push-To-Test Trailer Breakaway Kit with Built-In Battery Charger - Top Load - 50-85-313

Average Customer Rating:  4.8 out of 5 stars   (135 Customer Reviews)

Breakaway system with built-in charger is designed to bring a trailer safely to a stop by activating its electric brakes should it become disconnected while being towed. Push-button tester lets you know if the rechargeable battery is fully charged.


This was an exact replacement to my old unit. However the charge controller fried as soon as I connected the truck up. Had to swap out the control board from the old unit and working good now.

I have purchased all my needs through etrailer and always have a good experience. Was disappointed when the first brake-a-way kit failed like it did but you guys made it right and got a new one sent out.


I ordered this as a direct form factor replacement for the unit on my trailer. I knew the battery I had was bad and the system had corroded at the battery terminals. However when it had functioned it worked wonderfully. The package arrived without a secondary shipping box and the box holding the battery and charger circuit board was broken and would not stay shut. Upon inspection all parts within the two products were identical and I proceeded to swap out all parts and reassemble in old case. I connected the tow vehicle for an overnight charge and proceeded on our scheduled trip the next day with no issues. I expect that in another few years of use that the battery will die since I live in the Mojave and the heat kills batteries. I would simply order this product again. If I needed a new case I would have asked e trailer for an exchange.


I have a 2015 GMC Sierra 2500HD Diesel, towing a 2017 Pinnacle 36FBTS 5th. wheel. The Pinnacle has a standard drum braking system. On a long trip this year I cracked both rotors on my truck from over heating related to the Pinnacle's drum brakes failing to fully provide proper stopping.
I decided no more, and after much review I replaced the factory drum brakes with the Kodiak Discbrake system. (my first time ever doing something like this) In addition, one of the key items for me was a way not to replace my on-board factory trailer brake controller, (did not want to use an aftermarket product, that would diminish the interior look ) thus I also added the control Adapter Module that enabled me to use the factory installed brake controller. With all this change I decided to also go ahead and add a separate brake away battery. Everything I just described are shown in the attached photos.

I found eTrailer extremely helpful in answering questions, although I did not have a lot of questions since their online videos proved most helpful.

All parts of the Kodiak system worked fantastic following a 2500 mile trip. The improved braking is superior, and I did not need to replace my on board controller, but continued to use it by installing the control adapter. The disc brake picture is one of the disc brakes that I examined following our trip...all in perfect shape with everything working great for the entire trip.


This product replaced an identical system purchased from eTrailer many years ago. The installation was simple and quick. My breakaway is now working!

One potential problem with this kit is noted, however. The instructions for the kit indicate that the battery should be kept cool and the battery life will be shortened for temps above 85. Unfortunately, here in Texas we have already had 50+ days over 100 degrees this year (2022), so this may explain why my previous breakaway system died. Perhaps the manufacturer should offer a rugged version that can handle our Texas temperatures!


I installed this, a year ago, with no problems. I've never been in a situation where it should have triggered, but I've pulled the plug while I had a wheel jacked up and spinning and it's worked.

It still self-tests this spring as having a full charge despite a winter of sitting disconnected.

My only quibble is that it should be easier to remove the battery. I would have pulled the battery over the winter and put it on a trickle charger, but it looked like more of a hassle than I wanted to deal with.

Batteries wear out over time, and should always be easy to replace.


I would still be using the first one I bought from you but the battery terminal corroded off. It was trouble free till then. I bought a second for the ease of hook-up and history of the first.


I have received all my parts in a very timely manner. The product s were exactly what they were advertised as and the installation went well. Prices were very reasonable and was shipping.
Hopkins 7 way molded tral. Conn.
Trailer light kit part # I forgot
#mcl86ab clearance lights
#38656 junction box
#50-85--313 tekonsha breakaway.


It was time to replace the existing, well worn breakaway controller and switch on my 28' enclosed tag trailer. The original controller's battery was dead, the wiring was suspect, and it didn't have the charging or test features the Tekonsha does.

It took about an hour to install, as I had to replace some old wiring. Without any fuss, it all went together quite simply, and I can test the system very easily with the push of a button.


Always feel comfortable buying from e-trailerthe products are as represented and the service the best!


Works like a charm
The braking system
performs flawlessly.
As always ...... y’all have the best selection of quality products

The brakebreakaway unit is working perfectly. Still keeping my truck and trailer between the lines
Chip - 01/05/2022


Everything worked great. I was refurbishing a 1985 Hudson utility trailer. I have attached a picture of the finished product. Thank you for all your great products and support.


A top notch product that works well and is priced right. Thanks etrailer!


easy install works as it should in testing but i hope I never need it....


Product arrived quickly and was as described. One feature I especially liked is the light indicating that the device is being charged when 7-way connector is plugged into the tow vehicle. Included installation instructions were same as on the etrailer website and were not very useful. Wiring diagrams for other than the breakaway device itself were difficult to decipher. The installation video on the etrailer website, however, was easy to follow and left nothing unanswered.

Still working a designed, trailer parked for long periods, battery shows it’s holding a charge.
Smokymb - 07/04/2018


Using this kit to power the LED interior lighting in my covered motorcycle trailer. Also powers a couple of LED ramp lights that can also function as backup lights when connected to the tow vehicle. Works like a charm! Thanks eTrailer, for the large selection of trailer parts and accessories... and the fast delivery.

Still going strong... more than enough amperage to fully light the trailer interior with LED fixtures for hours on end. Couldnt be happier! Checking battery charge with a push of a button is a nice extra.
Ray H - 01/23/2015


Great product. Looks great. Fairly easy to install. If using a junction box with this product you need to remember to hook one of the leads from the break away switch to the black wire as described. The other wire hooks to the blue break wire. At first I hooked to the blue from my truck, the blue from this battery pack, and the blue going to my brakes. After several hours of trying to figure out the error it threw on my brake contoller in my truck I took it to a trailer place where they had to do some trouble shooting of their own. They found that the lead from the break away switch needed to be spliced into the blue wire going to my brakes after the junction box to make it work properly. It can't be on the same terminal as the battery pack. Other than this little issue it has been great, hopefully I never need to find out how well it works on a run-a-way trailer!


The kit was all I needed to replace my old unit. I am happy with the quality of the components. I would have given it 5 stars but the wiring diagram was printed for an electrician not a DIY trailer owner. Thanks

works correctly. green light every time I check it, yellow charging light when I hook up. Would buy this unit again.
John C - 12/10/2018


Nice kit that provides what you need for a break away system. Note that it comes with a switch -- you don't need to buy a separate one (as I did, ahem).

Mounts easily enough. I kinda wish the wires had been longer and the box was waterproof (or look like it would readily survive a rogue wave), but I just extended the wires myself and I'll be careful around water :)


I can only give this rating on the quality of the hardware because I never want to have to use it! Overall the product is well made with quality hardware components, a more than adequate sealed battery that came fully charged, and what appears to be 12AWG wiring where it needs to be to do the job the unit is intended for (lock the breaks in case of a breakaway). I bought this unit because I have a Tekonsha Brake Controller and I wanted to stay within the same product line.


Item arrived with battery leaking so I could not use. etrailer rep resolved the problem fast with a total refund. Note this was not a vendor, rather a supplier problem. I was completely satisfied.

very well.
Charles D - 05/30/2020


This product was just received, but it appears to be well made. Instructions were very clear, however I would suggest marking your trailer wire with colored tape prior to removing the original breakaway battery to avoid confusion.
In my case I did not want to drill additional holes in my trailer tongue due to the different configurations of battery box mounts.

Angela wit etrailer matched up the hole pattern within a few minutes and solved my issue.


The plastic face plate on the top lid came off on the first one when I was washing off the trailer. It didn’t work after a little water got inside. So this replacement one, I put a bead of “shoe goo” around the edges so it doesn’t happen again. Other than that, it works well when testing it out.


The Tehonsha push test breakaway kit was easy to install and has a great look. It's nice to be able to check the charge with a push of a button, it takes the guess work out. I installed the 50-85-313 on my 1996 coleman fleetwood keywest pop up camper, along with the tekonsha P3 break controller, both are great products and how it keeps everyone on the road safe. I tell people who ask me about them, where i got them from and about how helpful e-trailer employees are and how quick you get what you order. Keep up the great job.


This is a well-made product and was quite easy to install. The directions made the wiring simple. I especially like the test button on the top of the case, which lets you easily check the battery without opening the case. The case is a durable plastic, which allows some flexibility if you need to add another hole or two to match your current mounting bolts. After 3 years of use, the battery and housing have held up fine.


The Tekonsha breakaway kit was easy to install thanks to the great step by step video from etrailer. Everything seems to be working fine and I believe this is a very good product at a reasonable price. Thanks etrailer for the great service and fast shipping.

Show More Reviews

See what our Experts say about this Tekonsha Trailer Breakaway Kit

  • Troubleshooting Trailer Lights Not Working on Gooseneck Trailer
    If the truck wiring is working with other trailers then the issue is definitely on the trailer side. Although the hitch ball does provide an extra ground source, you do not want that to be the main ground for your trailer wiring. You should have a main ground wire somewhere that is connected to a clean, bare-metal surface. If this is not the case then that is the culprit and you need to fix it. The ground wire can be found and traced from the pin in the 5 o'clock position on your trailer...
    view full answer...
    Image 1 for Image 2 for
  • How Long Will Battery Last for Tekonsha Push-To-Test Trailer Breakaway Kit
    Without being used the 12V battery included with the Tekonsha Push-To-Test Trailer Breakaway Kit # 50-85-313 will start to lose charge at around 6 to 8 months. At the year mark it will fall below nominal charge and at 1-1/2 to 2 years it will be completely dead and would need to be jumped. When installing the breakaway kit you will want to run the black power wire to the 12V circuit coming from the trailer's 7-Way so that the battery can maintain its charge during travel. I have attached...
    view full answer...
    Image 1 for
  • Wiring Installation of Tekonsha 50-85-313 Trailer Breakaway Battery Kit
    The Tekonsha Push-To-Test Trailer Breakaway Kit with Built-In Battery Charger - Top Load # 50-85-313 is a much better option for your Breakaway system than having the trailer house battery serve that purpose. The way you wired the 12V input to your trailer battery, you will still be draining your trailer battery as it seeks to charge the breakaway battery. Once that trailer battery falls below a certain point, you will then drain the breakaway battery to try to charge the trailer house...
    view full answer...
    Image 1 for
  • Can Larger Battery Be Used for Trailer Breakaway System and Interior Lights
    The Tekonsha Push-to-Test Trailer Breakaway Kit # 50-85-313 that you referenced includes the small 12V rechargeable battery and charge wires that will be connected to the 12V circuit on the trailer's 7-Way. You could physically use the system with a larger battery (it wouldn't be overcharged) but I do not recommend using the larger battery for both your trailer's interior lights and the breakaway system. This is because for safety reasons you really want to have a dedicated battery in...
    view full answer...
  • Are Trailer Breakaway Kits Universal in How they Install
    Yes, our trailer breakaway kits like the Tekonsha Push-To-Test Trailer Breakaway Kit with Built-In Battery Charger # 50-85-313 are universal. They wire to all trailers in the same way and are not model specific at all. If you check out the install diagram I attached you'll see how they wire in and you'll be able to see what I mean by the kits being universal.
    view full answer...
    Image 1 for
  • Breakaway Kit Recommended for Triple Axle Trailer
    It's true that most breakaway kits are for single or tandem axle trailers but there are some for 3 axles as well. I recommend the Tekonsha, part # 50-85-313, which includes a built-in charger. This is a complete kit that comes with the battery as well.
    view full answer...
  • Breakaway Kit That Works With Triple Axle Trailer
    We do have a breakaway kit for your electric brakes that is compatible with a triple axle trailer. What you need is the Tekonsha Push-To-Test Trailer Breakaway Kit with Built-In Battery Charger # 50-85-313. I have added a link to a video installation for you to check out as well as a link to the installation instructions.
    view full answer...
  • Does Lid of Tekonsha Trailer Breakaway Kit with Battery Charger # 50-85-313 Need to Face Up
    Since the battery that goes in the Tekonsha Push-To-Test Trailer Breakaway Kit with Built-In Battery Charger # 50-85-313 has to point up at all times the lid also needs to be on top of the box as well. I attached an install video for this kit for you to check out as well.
    view full answer...
  • Recommendation on a Breakaway Kit to Fit a Tandem Axle Trailer
    Most of the breakaway kits that we offer do include the battery. It is also a good idea to get a kit that has a built in battery charger. I recommend the Tekonsha Breakaway Kit # 50-85-313. This kit will include an integrated battery charger along with the battery. The battery charger is a multi-stage charger that will extend the life of the battery and allowing for quick re-charging. This kit also includes a push to test feature. There is a tester that will show if the battery is charged...
    view full answer...
  • Will Built-In Charger in Tekonsha Breakaway System Over Charge the Battery
    The Breakaway Kit with Premium Integrated Charger # 50-85-313 should not overcharge the battery in the system. It will go into a maintenance mode to maintain the optimum charge after the battery is fully charged. A battery being charged will get hot depending on how much it needs to be charged. It is best to charge the battery while towing or while the vehicle is running so the maximum amperage is being pushed back. This will reduce the time it takes to charge the battery. Charging even...
    view full answer...
  • Can a Trailer Break Away System be Tested with Trailer Connected to Tow Vehicle
    You should always disconnect the trailer before testing a break away system, including # 50-85-313. Testing the system in this case means pulling the break away pin from the switch. The resulting charge from the break away battery could lead to back feeding on the brake output circuit back to the controller. Some controllers have built in circuit protection to prevent damage to the controller. I would need to know the make and model of the controller to determine if it has that feature. You...
    view full answer...
  • Will I Need to Replace Brake Assemblies After Driving 5 Miles with Brakes Locked Up
    Chances are you will need new tires at the very least. But I would recommend you remove your hubs and check your brake assemblies and hub and drums. You may find that you will need to replace everything or just some components. Chances are the shoes are shot, for the price of new shoes you're probably just better off buying new assemblies. In order to get the correct brake assemblies you will want to measure your brake assemblies. You will want measure across from the outer surface of...
    view full answer...
  • How Long Should a Trailer Breakaway Cable Be
    The best length for the cable of a breakaway system like the Tow Ready Trailer Break Away Kit # 50-85-313 that you referenced will be just a bit longer than the safety chains. The breakaway cable should be longer than the safety chains according to RVIA Recreational Vehicle Industry Association. This will activate the brakes in the event you lose the trailer connection and the safety chains fail which will bring the trailer to a stop.
    view full answer...
  • Where Do Each of the Wires of the Tekonsha Breakaway System part # 50-85-313 Run
    The three wires of the Tekonsha Breakaway System part # 50-85-313 will get wired as follows: The white wire attaches to the ground wire. The blue wire attaches to the brake output circuit that goes to the brake assemblies of the trailer. The black wire runs to the 12 volt power source of the 7-way.
    view full answer...
    Image 1 for
  • The Correct Breakaway Kit Battery Size to Use on a Trailer
    Using the house battery on your trailer will provide a 12-volt power to a breakaway kit, but is not recommended. A Breakaway Kit, like # 50-85-313, is designed to stop a trailer that has come uncoupled from a tow vehicle. This kit relies on the power of the battery to activate if a trailer is comes uncoupled. Manufacturers recommend that you use a dedicated power source on the breakaway switch to make sure that there can be no outside draw or interference on the breakaway circuit. There...
    view full answer...
  • Locating Power Wire for Breakaway Battery
    If the yellow wire has constant 12V power when connected to the tow vehicle, then you can use it to charge your breakaway battery. If the yellow wire doesn't have constant 12V power then my guess would be that its tied to the center pin of the trailer connector which is typically used for the reverse lights. If this is the case then you will want to splice into the wire that is in the 11 o'clock pin when looking at the face of the trailer connector, this is usually a black wire, which...
    view full answer...
    Image 1 for
  • Does Tekonsha Breakaway Kit with Integrated Charger Meet DOT Requirements
    I just verified with Tekonsha that the Breakaway Kit with the Integrated Charger # 50-85-313 does meet all DOT requirements.
    view full answer...
  • Troubleshooting a Breakaway Kit that Applies Voltage on Trailer Brakes All the Time
    It sounds like you may have wired your setup in such a way that the battery is somehow putting voltage on the brake output circuit which is why your brakes are locking up. Check the third page of the installation instructions I attached to see the wiring diagram on how it should be wired up and compare it to your setup. You should also check to make sure that the plunger is properly installed into the switch.
    view full answer...
  • Break Away Kit with Charger Installation on a 25 ft 2003 Continental Cargo Trailer
    To install the Tekonsha Push to Test Breakaway Kit with Premium Integrated Charger you will first need to remove your old breakaway kit. You may be able to reuse some of the wiring of your old kit, but you may have to just start over with the wiring to install the # 50-85-313. Next you will want to mount the # 50-85-313 in a place that is easily accessible for you. The blue wire of the # 50-85-313 will attach to one end of the included breakaway switch (does not matter which side you...
    view full answer...
    Image 1 for
  • Can a Parking Brake or E-Brake Be Added to Dexter Electric Brake Assemblies
    A parking brake system, also known as an e-brake, can only be used if the brake assemblies are already equipped with a parking brake. Dexter does offer electric brake assemblies with a parking brake, but their standard electric brakes assemblies cannot have a parking brake added to them if they were not already properly equipped. You can tell if your brakes are equipped with a parking brake by looking at the backing plate. There will be an actuating lever at the top of the brake assembly...
    view full answer...
    Image 1 for
  • How to Bypass a Trailer Breakaway System on a Trailer
    There is a way to bypass the breakaway system of your trailer but I would only recommend you do so to get your trailer to a dealer so that it can be fixed. If you were to get pulled over and the breakaway system was to be tested you would get in trouble. To simply bypass the system you would just need to cut the wire that goes from the switch to the brake output circuit of your trailer wiring.
    view full answer...
  • Dimensions of the Battery Box in the Tow Ready Trailer Break Away Kit # TR20048
    I went and pulled a Tow Ready Trailer Break Away Kit # 50-85-313 from our warehouse to measure the dimensions of the battery box and found that the box has an overall height of 6 inches, the width of the box including the brackets is 7-3/4 inches, without brackets (just the box itself) 6-1/2 inches wide, and 3-5/8 inches deep.
    view full answer...
    Image 1 for
  • How Long Should a Trailer Breakaway Cable Be on a Gooseneck/Fifth Wheel Trailer
    The breakaway cable should be longer than the safety chains according to RVIA Recreational Vehicle Industry Association. This will activate the brakes in the event you lose the trailer connection and the safety chains fail which will bring the trailer to a stop.
    view full answer...
  • Does The Tekonsha Trailer Breakaway Kit # 50-85-313 Include a Battery
    Yes, the item you selected, Tekonsha Trailer Breakaway Kit, part # 50-85-313, comes included with a 5 amp battery. I have linked and FAQ Article on trailer breakaway kits and a video review and installation of the Tekonsha Trailer Breakaway Kit, part # 50-85-313.
    view full answer...

< Previous
123. . .6

Do you have a question about this Trailer Breakaway Kit?

  • Why

    At we guarantee:
  • Real product know-how.

    We make sure that the products we sell are what we say they are, and that they work the way they are supposed to work. Get real advice from a real person who has the knowledge and expertise needed to solve your problem.
  • Most detailed, accurate trailer breakaway kit information available.

    Because we take providing accurate product information seriously, we take our own detailed product photos, demo videos and installation videos, as well as verify measurements, instructions, and vehicle fit information.
  • Installations, made easy.

    We love helping people and have the most highly-trained customer service, hands-on experience, step by step videos and installation instructions.
  • Fast shipping.

    Your order is automatically routed to get out of our warehouse and to your door as quickly as possible. Receive free shipping on orders over $99.
  • Personalized service for life.

    We provide one-on-one, personalized service from the ordering process through the life of your product.
  • Trusted since 1946.

    We've been serving customers since our parts store first opened in 1946 and continue to be recognized by our customers, our vendors and third parties for exceptional service.
  • Returns Policy

    Need to return an item? No problem. Please read our Returns Policy for more information.

Info for this part was:

Employee Mike L
Expert Research:
Mike L
Employee Michael H
Expert Research:
Michael H
Employee Reno H
Expert Research:
Reno H
Employee Jameson C
Expert Research:
Jameson C
Employee Andrew K
Video Edited:
Andrew K
Employee Jacob T
Video Edited:
Jacob T
Employee Adele M
Updated by:
Adele M
Employee Laura H
Updated by:
Laura H
Employee Wilson B
Updated by:
Wilson B
Employee Alexander C
Updated by:
Alexander C
Employee Brian T
Updated by:
Brian T
Employee Isabelle B
Updated by:
Isabelle B
Employee Dustin K
Video by:
Dustin K
Employee Cole B
Installed by:
Cole B
Employee David F
Installed by:
David F

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.

Product Experts Available Now!
Call 1-800-940-8924