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  1. Trailer Breakaway Kit
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  3. Kit with Charger
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  5. Single-axle
  6. Tandem-axle
  7. Triple-axle
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: $61.87
You Save: 28%
Trailer Breakaway Kit
Shipping Weight: 5 lbs
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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.
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  • Reviews (145)
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Tekonsha Trailer Breakaway Kit - 50-85-313

  • Kit with Charger
  • Top Load
  • Tekonsha
  • Single-axle
  • Tandem-axle
  • Triple-axle
  • LED Tester

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:  4.7 out of 5 stars   (145 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.


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.


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.


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.


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.


Works Great


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!


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.


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.

Ray H.


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.


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!


Works great easy hookup


Quit working at 300 miles

Etrailer Expert

Jenny N.


The kit does have a one-year warranty. I can send you the warranty instructions if you are interested.


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

John C.


works correctly. green light every time I check it, yellow charging light when I hook up. Would buy this unit again.


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.


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.


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


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.

Charles D.


very well.


This product surprised me. The product is of higher quality that I expected and too good for the trailer it was purchased for! I would up swapping this unit into my enclosed trailer and taking the factor- installed unit from that for my open trailer!

Etrailer is my go-to for all my trailering needs.


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.


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.


This was a great buy with the battery & charger included. If your main battery is dead this one keeps your breakaway switch active. You need this while transporting your trailer from your winter location to your summer storage area.


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

  • 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.
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  • 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...
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  • 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...
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  • 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...
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  • 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...
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  • 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.
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  • 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...
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  • 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...
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  • 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...
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    Image 1 for
  • 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.
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  • 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.
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    Image 1 for
  • 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...
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  • 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.
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  • 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...
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  • Manually Activating Break Away System to Keep Trailer From Getting Away While Moving By Hand
    Because trailer break away systems are desgined in a specific manner to provide maximum reliability and safety over the service life of the system, I'd be very reluctant in advising you to alter it in any way. Pulling the pin in the event of an emergency would be the safest and most advisable way to actuate the trailer brakes should the trailer get away from you while manually moving the trailer around.
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  • Smaller Battery for Trailer Breakaway
    Breakaway batteries like what comes with the Tekonsha Push-To-Test Trailer Breakaway Kit with Built-In Battery Charger # 50-85-313 that you referenced come with much smaller batteries than what you have now so using this kit would allow you to have the lighter weight battery setup you are wanting for your breakaway.
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  • Is There Difference Between Trailer Breakaway Kits 50-85-313 and 50-85-315
    Essentially the two kits are the same thing just under a different brand name with the # 50-85-313 being Tekonsha and the # 50-85-315 being a Tow Ready. Functionally there is no difference.
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  • 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.
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  • Breakaway Battery Recommendation for Triple Axle Trailer
    I have a couple of breakaway battery kit options for you, but the Hopkins Engager Trailer BreakAway Kit # 20400 is not compatible with your triple axle trailer. The # 20400 is only designed for use with single and tandem axle trailers. For your triple axle trailer, you will want to use a breakaway battery that is designed to work with triple axle trailers. I recommend using the Tekonsha Push to Test Breakaway Kit with Premium Integrated Charger # 50-85-313 because it has the same great...
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  • Troubleshooting Trailer Brakes that Are Weak with Controller but Not with Breakaway
    Since your breakaway battery has the amperage and voltage to lock up your trailer brakes we know the trailer side of the brakes and wiring to them are good. So that would indicate that the brake controller isn't able to send enough power/amperage to the brakes to effectively lock up the brakes. This could be because you have more brake assemblies than what your controller was designed to activate as some only can be used on tandem axle brake axles whereas controllers like the P3 part #...
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  • Battery on Tekonsha Trailer Break Away System not Receiving Charge
    I would begin by testing the 12-volt accessory power circuit pin on the tow vehicle 7-way connector using a circuit tester like part # 40376. The 12-volt accessory pin is in the 2:00 position in the connector socket as shown in the provided photo. If you are not showing power on that pin, how to proceed next will depend on the year, make and model of vehicle and whether or not the 7-way is factory or aftermarket installed. If the 7-way is factory installed, the fuse is most likely protected...
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    Image 1 for
  • Recommended Trailer Breakaway System for a Utility Trailer Hopkins or Tekonsha
    Our most popular breakaway system is the Hopkins Engager part # 20099 which would be an excellent option. The similar Tekonsha part # 50-85-313 would also work really well, but since the Hopkins has a better price and more positive reviews it would be the system I would personally go with if I were you. I attached an install video plus a help article on these systems for you to check out as well.
    view full answer...
  • How Does Breakaway Switch With Two Black Wires Get Wired To Trailer?
    The battery for your breakaway switch will need to have at least a partial charge for you to verify that the system is working correctly. Breakaway kits like the Tekonsha Push-To-Test Trailer Breakaway Kit with Built-In Battery Charger - Top Load # 50-85-313 also use a switch with two black wires, and either wire can be connected to the trailer brakes or the breakaway battery. I included a video of the # 50-85-313 for you to take a look at.
    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...

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Info for this part was:

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Employee Andrew K
Video Edited:
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Employee Jacob T
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Employee Adele M
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