How to Power Christmas Lights with a Battery

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Christmas is a wonderful season filled with joy, love, food and loved ones but one of the best ways to get into that spirit is with decorative items. While there are many ways to deck out your home for the holidays, one of the most popular is with Christmas lights. Read on how to power Christmas lights with a battery.

However, what do you do if you don’t have an outlet nearby or if you’re traveling and want to bring your favorite lights with you to place at a significant other’s place or at your family home? The answer is simple: you can power Christmas lights with a battery.

Not only do Christmas lights come in a wide variety of colors and styles, but they also come in a range of prices. You can find some really affordable lights if you’re on a tight budget, or you could go all out and purchase the most high-end set available. No matter what your preference, there’s a set of Christmas lights out there that will perfectly fit your needs.

When it comes to powering your Christmas lights with a battery, there are a few different options to choose from. One of the most popular ways to do this is by using battery packs. Doing this can even allow you to even get more in touch with your creative side and set up up a mini show stand or embed the lights in way that can fit in with your costume or get up. Perhaps even wander around with them while you go caroling. 

Regardless of how you choose to use them, battery powered Christmas lights are a great way to get into the holiday spirit and show your loved ones just how much you care.

Also Read: Best Solar Christmas Lights 

How To Power Christmas Lights With A Battery

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Now this idea works best with string lights or icicle lights. If you have a set of mini lights, they might not work as well. Adding a battery connection allows for versatility and mobility when it comes to your holiday decorating.

Tools Required

You will need the following list of tools in order to complete this project:

  • LED Christmas lights
  • Wire cutters 
  • Pliers
  • A Battery harness or multiple
  • Electrical tape for insulation
  • AA battery pack(s) – (You might need more than one, depending on how many lights you’re powering) 

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Duracell - CopperTop AA Alkaline Batteries - long lasting, all-purpose Double A battery for household and business - 24 Count

Steps to follow

Now let’s get to it and show you how to power your Christmas lights with a battery!

Step 1: Create a Battery Source:

When you want to use batteries with string lights, to ensure that each bulb is receiving the adequate amount you’ll need to cut and rewire the strand. Strip off about a half an inch of insulation from the end of each wire and twist them together in a consistent manner. 

The number of batteries required will vary depending on the type of lights you use. For example, 3.3v LEDs require 6v.

If you are using a battery pack that has more than one connector, you will want to connect all of the positive wires together and all of the negative wires together. After that, tape each wire connection with electrical tape in order to keep them from coming apart.

Because a wall outlet provides 120 volts, each bulb on the strand requires 2.4 volts, and you’ll need eight 1.2v batteries for 9.6v lights wired in a chain of four. Begin by cutting the strand into three halves with four bulbs on each, then proceed as follows. Please be careful when wiring the strands, incorrect wiring can result in a fire.

Step 2: Connect the Wires

Connect the battery’s positive terminal to the wires at the start of each set, wrapping the power wire around them to keep everything tidy. Now, join the ends of each set together in the same manner as you did with the power cable and the return wire should be connected back to the battery pack.

Step 3: Apply Electrical Tape

For the next step, you’ll want to apply some electrical tape over the connections between the battery, the light strand, and the power wire. This will help to keep everything in place and prevent any possible shorts. For additional measure you can also use duct tape to hold everything together.

Step 4: Add Batteries to the Battery Harness

The batteries will need to be held in place by the battery harness, which is usually adjustable to fit a range of sizes. If it’s not, you can use some electrical tape to secure them in place. Make sure to test your lights by powering them on to see if they are working correctly during after placing them in the harness.

Now you’re all set to enjoy your battery powered Christmas lights!


Will LED lights work on 12v?

To answer this question, you will need to know the wattage of your LED lights. There are a variety of online calculators that can help you determine this information. In general, most LED Christmas lights will work with 12 volts, but it is always best to check the specifications of the light strand before making any connections.

How long will a 12V battery run LED lights?

Under normal use, a 12-volt battery should be able to power LED lights for at least two hours. If you are using more powerful LED lights or if the weather is cold, the battery might not last as long. It’s always a good idea to have some backup batteries on hand just in case!

How long will a car battery run Christmas lights?

A car battery can power LED lights for a much longer period of time, depending on the size of the battery and the wattage of the lights. A standard car battery should be able to run Christmas lights for at least 8 hours without any problems. In some cases, the battery might even last longer as long as you don’t have any other electrical devices running at the same time.


In summary, there are a few different ways that you can power your Christmas lights using batteries. For smaller strands of lights, you can use AA or AAA batteries. If you have a set of LED lights that require more voltage, you can use a battery pack or car battery.

Also Read: NIMH Vs. NICD Batteries

Be sure to take into account the wattage of your lights when selecting the right type of battery and always follow basic safety precautions when wiring the strands together. By using batteries, you can avoid having to run an extension cord and keep your holiday decorating simple and fuss-free!

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