Having a few laptop batteries in your bag pack can really be convenient just in case you need to power your laptop for several hours on end. You could make say three or four such batteries that can last you the whole day if you envision that you won’t be getting near a power source any time during the day. Below is a systematic way of making your own laptop battery that will work just as well as the one you are using on your laptop. The first thing to do is to know the exact amount of input voltage that your laptop requires. This will help you know the number of lithium ion batteries you will require to come up with your external battery. For example, if your computer requires input voltage of 19 volts and each lithium ion battery is about 3 volt, you will need about six such batteries.
The next thing is collecting all the material and tools you will need to accomplish this project. I like being organized when working on a such project since it helps you work more efficiently. Some of the things you will need include lithium ion batteries, insulating tape, connecting wires, scriber and a small knife. You may also want to put on safety glasses and gloves before you start working.
Once you have everything ready, you can now start working. First, you want to arrange the batteries in series so they deliver enough power to the computer. Assuming you need six lithium ion batteries, you will lay them on your working table and make sure they are alternate with each other. What this means is that if battery number one positive side is facing upwards then battery number two negative side must also face upwards.
Once you’ve arranged them neatly on your working table alternately, take your insulator tape and rap them all up in a neat fashion. Make sure that the six batteries or whichever number you decide to work with are attached to each other tightly by the insulator tape. The next step is cutting small pieces of wire and connecting each battery to the next so that they form a series circuit. Once you are through with this, test with your multimeter to make sure that the overall power of the lithium ion batteries will be suitable for your computer. If everything is per the specification, you can now wrap up the entire piece with insulator tape.
You’ll need to connect the terminals of your battery with a long enough connecting wire which will then be connected to a power jack. A power jack can be bought at your local stores for only a few dollars. You might want to use one that does not need soldering if you are not that comfortable using a soldering gun.
With those few steps you should have your external laptop battery up and ready. You could even make three or four such batteries and connect them in parallel. This will make sure that you use your laptop for hours without running out of power. To connect in parallel, just connect the positive side of each battery to positive and negative-to-negative which will then lead to the power jack and then to your laptop.