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Breakaway Kit Replacement 12 V Battery

Breakaway Kit Replacement 12 V Battery

Item # HM20008
Our Price: $34.11
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Shipping Weight: 3 lbs
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Breakaway Kit Replacement 12 V Battery 12V Battery HM20008
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Hopkins Accessories and Parts - HM20008

  • Trailer Breakaway Kit
  • 12V Battery
  • Hopkins

Hopkins Replacement 12 Volt Battery for Trailer Break Away Kits.

  • Measures 3-1/2" L x 2-3/4" W x 4" H

20008 Breakaway Kit Replacement 12 V Battery

California residents: click here

Video of Breakaway Kit Replacement 12 V Battery

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

Video Transcript for Hopkins Trailer Breakaway Kit HM20008 Review

Today, we're going to be taking a look at part number HM20008. This is the Hopkins replacement 12 volt battery for trailer breakaway kits. It's designed to power the trailer brakes in a breakaway situation for a full 15 minutes on a 1 to 2 axle trailer, which will keep the trailer from a run-away situation. The 12 volt battery is rated at 5 amp hours, which is common for breakaway kits. It's going to feature F1 terminals. Now, these are going to measure at 0.187 inches wide, which is also 3/16th of an inch in width. If we tend to look at the overall dimensions of the battery, nice compact size.

Measuring this direction, that's going to give us a measurement of about 3-1/2 inches. If we measure the height, we're looking at 4 inches, and then if we measure the width, that's going to give us a measurement of about 2-3/4 of an inch. That's going to do it for today's review of part number HM20008, this is the Hopkins replacement 12 volt battery for trailer breakaway kits. .

Customer Reviews

Breakaway Kit Replacement 12 V Battery - HM20008

Average Customer Rating:  4.9 out of 5 stars   (106 Customer Reviews)


Always excellent products and service!


Tara set up the order for me and had it in the mail that afternoon. It arrived a day ahead of time no problems. It was fully charged right out of the box. It fit right into the charging system box just as Tara said it would. The brakes on my Worthing double axel motorcycle trailer engaged and held till l reconnected to runaway cable. I had been trying to locate a TAP replacement battery and was informed by Tara that TAP had been bought out by Hopkins and this was the same battery with their name on it.

No problems with this battery or keeping it charred. If I do not use the trailer for a time I keep an eye on the charge light if it goes from green to yellow I just plug the trailer into my truck connector and let it charge for an hour or when it returns to green it’s good to go!!
Harry - 04/11/2021


Perfect replacement of my original battery. Exact same size as original battery, allowing the battery to fit in the plastic receptacle box that protects the battery and charger and mounts to the trailer.

E-Trailer is GREAT. The products I purchased a year ago continue to work perfectly. I will remain a loyal customer always!
Michael B - 06/17/2016


Exact replacement for my trailer breakaway emergency brake. Wanted a battery designed for transportation instead of a cheap UPS battery. eTrailer always has great service and web documentation so you can't go wrong.


Seems to be a great battery and fits right in the battery box of my haulmark motorcycle trailer. The hitch and coupler locks are great. They too fit perfectly and so much easier they are keyed the same. Exremely fast shipping and great communication by email from etrailer. I ordered another part from another company two days before ordering the battery from etrailer. It's still not here. I highly recommend etrailer. I will not get any trailer parts or accessories anywhere else from now on.


this battery was just what I needed to replace one that was many years old . It has the ability of stopping a runaway trailer by applying the brakes . with out it the trailer would travel on down the road ,,,,,,,
This is a first class battery ,,,,,,I contacted several options from the manufacturer to other listings
these folks are the ones to deal with !!!!
don't buy from any one else !!!!


I needed a new 12 volt battery for my utility trailer break-away brake. I found what appeared to be a direct replacement on based on the good description and high resolution picture on the website. I placed the order and the battery appeared two days later. The battery was exactly what I needed. The quality was good and the size was as advertised. The terminals were the right size and in the right places. Based on service like this, etrailer is the first place I look for my trailer and towing needs.


Exact fit for the TAP battery #20008 trailer brake-away emergency braking system. The battery box is made to ONLY fit this size battery! It also came fully charged and we put the trailer on the road the day I received it.
Thanks for a quick delivery and perfect fit!!


I had a difficult time resourcing a 12 V Battery, for my trailers brake-a-way system locally.
I had previosuly ordered from etrailer, and was very pleased with thier service, and care to communicate the leadtime for delivery.
Great customer service!


Perfect "10" from start to finish! This company is head and shoulders above any other online company we have ordered from. They kept us posted from the very start through the tracking and final delivery with email updates. A personal message in the emails from several customer service agents asking us to call if we had any questions Do not hesitate to purchase from them, and if you do, you will be as pleasantly surprised as we are. We will be repeat customers!


So happy to find the exact battery I needed that fit the trailer braking system. I was worried that it would be hard to find the funky size for this older system. Came right away, too. Thank you.


Item arrived already at peak charge and ready to install. This name brand battery was more money than other's but I didn't want to risk a breakaway with a battery I've never heard of. I paid allot for quick delivery but that's the way it goes. I needed it asap and it was received on time. So overall a good purchase.


Just shows it pays to purchase from the OEM distributor. This batttery was the exact replacement and fit perfectly in the housing. I had looked at some cheaper replacement models, but they were just a bit larger, and would have required modification to fit. Using the proper size required little effort on my part, and the process was completed in less than 5 minutes.

Still working perfect after a year....including setting with no use during a Michigan winter!!
Kevin L - 06/06/2016


Good internet description on and an exact fit matching specifications of the battery being replaced. Good price, prompt shipment, and well packaged...what more could you ask for.


I was delighted with the arrival of the break-away battery. It was exactly as described and was charged and ready for use. My greatest appreciation goes to etrailer for the rapid response and arrival of the battery. I requested standard shipping. etrailer offered, without additional charge, priority shipping getting the battery to me within two days. WOW!!!


Direct replacement for my Triton Prestige brake-away system. Second purchase I made from etrailer in the past year. Great prices and reasonable shipping costs.


Haven't installed it yet but arrived right on time and is exactly as described. I have ordered a number of things from etrailer over the years and always am very happy. Their website with all of the reviews, videos, install instructions etc is really great. Keep up the good work guys.


Perfect replacement of my original battery. Exact same size as original battery, allowing the battery to fit in the plastic receptacle box that protects the battery and charger and mounts to the trailer.


Replacement battery for emergency/breakaway brake on car trailer... works well.

by: is my go-to source for trailer gear. I couldn't find this battery locally; this new one is exactly what I need. Great price, great customer service!


Not using this battery as a breakaway power source; using it as a battery to start a 50cc scooter! works great! A lot less money than buying a OE part!


Very satisfied with the products that I recently purchased from etrailer.
From ordering off the etrailer web site to receiving my order was very quick and efficient. I will definitely be using etrailer in the future for all my 4 trailers needs.


Bought wheels and breakaway battery for my trailer, everything looks great and was shipped quickly. Thank you for great service


I recently ordered a replacement battery for my deck over trailer. The order was placed and the battery was shipped immediately and received in excellent packing and condition. I would recommend etrailer to anyone. Thank you, Denny


Y'all got it right! I'd ordered from another company and it was wrong. More time wasted. I bought lots of stuff from y'all and it's always been right. Lesson learned.

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