How to Splice Battery Cables Together: Three Easy Methods

Splicing battery cables together is a budget-friendly and easy way to make cables longer and repair corroded or broken cables. In addition, DIY splicing cables is a more cost-effective solution than hiring a mechanic, for instance, to do the job. In this article, we discuss three methods to splice battery cables together and their benefits and downfalls.

First, we go over crimping your cables which is a fast and easy way to elongate cables. Following this is the tried and tested soldering method, and finally, we go over the easiest and possibly cheapest method, using heat shrink self-soldering connectors.

Method 1: Crimping Your Cables

Crimping your cables is a quick, cost-effective, and effective way to splice battery cables together. Unfortunately, crimping is not a waterproof method and therefore is only recommended for the sections of wires that are not exposed to the elements.Crimping To Splice Battery Cables Together

Step 1: Get The Right Tools

The best option for this method is to use a professional crimping tool. However, these tools can vary significantly in terms of quality and price range; therefore, make sure you buy the right tools for the job. However, if time is of the essence and you do not have a crimper, you can make do with a razor blade and standard pliers. You will also need some butt connectors that are easily accessible.

Step 2: Remove insulation

Remember to take off no more than a quarter of an inch of insulation on the ends of the wires you wish to splice. As many butt connectors have separators in their center, it is preferable to remove smaller amounts of insulation first. Doing so prevents any wire from being exposed to the elements.

Step 3: Use the appropriately sized connector

Once both ends of the cables are stripped, you must choose the appropriate butt connector. Unfortunately, many people choose the wrong size and try to force the wire, which leaves wires left out of the connector or a poor connection.

Step 4: Place the wire in the connector and crimp the connector

Place the connector into your crimping tool with the seam and connector pointed towards the valley of the crimping tool. Place the wires inside and close the crimp. Tug at the wire to ensure it remains in place. Be sure to do this on both sides of the connector.

Step 5: Insulate connection

Wrap the connection and wire with insulation tape. It will help protect the connection from outside elements and ensure it lasts longer.

Method 2: Soldering

Soldering is one of the most effective methods of splicing cables together and making longer battery cables. You will need a soldering kit, Rosin Core Flux, shrink tubes, and a heat gun for this method. With an insulate connection, you create durable connections that are also water-resistant.Soldering To Splice Battery Cables Together

Step 1: Remove insulation around the wire

Like the first method, it is best only to remove a quarter of an inch of insulation.

Step 2: Adding the heat shrink

Affix the heat shrink onto the one side of the wires prior to soldering the connection.

Step 3: Intertwine wires

Taking both ends of the wires, separate the wires by fanning them and intertwining the two together. Create a firm grip between the two.

Step 4: Solder the pieces together

Heat your soldering iron and tin the tip before heating the wire from below while feeding the solder from the top. Melting the flux into the gaps and finally covering the whole area. Do not cold solder as it creates a poor connection.

Step 5: Heat the heat shrink

Once the solder has cooled down, slide the heat shrink placed earlier over the connection. Then use a heat gun or hair dryer to heat it until the shrink has wrapped around the wire.

Method 3: Use Heat Shrink, Self Solder Connectors

This method is both cheap, fast, and incredibly easy. The connection is both waterproof and durable and requires minimum effort. Additionally, You can also find the connectors relatively easily for low prices.Heat Shrink To Splice Battery Cables Together

Step 1: Strip the insulation

Again strip only a quarter of an inch of wire on both ends.

Step 2: Place the connector

Slide the appropriately sized connector over one end of the wire.

Step 3: Entangle the two wires

Like soldering, fan the two ends of the wires and entwine the two together in a tight bond.

Step 4: Center the connector and heat

Place the soldering connector over the center where the two wires meet. Then use a heat gun or hair dryer on the hot setting to heat the connection. Watch as the connector wraps around the wires and solders the connection itself.

Final Thoughts

We hope you have found this post about the three easy ways to splice your battery cables together useful. Each method has its pros and cons, so keep this in mind when deciding on the best strategy for your application. We have provided different ways to suit different types of people, whether they are soldering professionals or have never spliced wires before.

There is a suitable method to suit everyone. The three best ways for splicing battery cables together involve crimping, which is the cheapest way, soldering cables that provide a more durable and waterproof solution, and finally using soldering connections for splicing your connections instantaneously. It is up to you to decide which method is the most suitable option for you.

You Can Also Read: 

Leave a Comment