![]() There are many different types of 18650 cells out there to choose from. Depending on the size of the battery you plan to build, you’ll need anywhere from a few dozen to a few hundred of them. These cells are distinctive due to their cylindrical shape and are about the size of a finger. For many years there were only mediocre 18650 cells available, but the demand by power tool makers and even some electric vehicle manufacturers for strong, high quality cells has led to the development of a number of great 18650 options in the last few years. Heat gun or hair dryer (if using heat shrink tube)ġ8650 cells, which are used in many different consumer electronics from laptops to power tools, are one of the most common battery cells employed in electric bicycle battery packs.Large diameter shrink wrap or tape (optional, sort of).Short length of silicone wire (12-16 awg).If you don’t understand something in the text, try watching it in the video. The battery used in the videos is the same voltage but slightly larger capacity. Note: At multiple points along this article I have inserted videos that I made demonstrating the steps involved in building a battery. Always seek professional assistance if needed. ![]() Please read this article in its entirety before attempting to build your own ebike battery. Building a DIY lithium battery requires a basic understanding of battery principles and should not be attempted by anyone lacking confidence in his or her electrical and technical skills. Safety disclaimer: Before we begin, it’s important to note that lithium batteries inherently contain a large amount of energy, and it is therefore crucial to handle them with the highest levels of caution. But it will definitely be worth it in the end when you’re cruising around on your very own DIY ebike battery! Now buckle up, grab a drink and get ready for some serious reading, because this isn’t a short article. With a limited number of electric bicycle battery suppliers and a myriad of different factors including size, weight, capacity, voltage, and discharge rates, finding the exact battery you are looking for can be challenging and lead to unwanted compromises.īut what if you didn’t have to compromise? What if you could build your own ebike battery to your exact specifications? What if you could build a battery the perfect size for your bike, with all of the features you want, and do it for cheaper than retail? It’s easier than you think, and I’ll show you how below. Unfortunately though, a good ebike battery is often the hardest part to come by – and the most expensive. Your motor is useless without all of that energy stored in your battery. A lithium battery is the heart of any electric bicycle.
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