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![]() ![]() Depending on the drill brand you have and which one of their batteries you’re using, you might find it has two or three terminals instead of four.īut that raises another question: if drill batteries can function perfectly well with two or three terminals, then why would any of them need four? Well, firstly, let’s remember that not all drill batteries have four terminals. So why would a drill battery need up to four terminals instead? When people think about batteries, they usually visualize only the positive and negative terminals. Why Do Drill Batteries Need Four Terminals? These terminals are designed to help with battery balancing, which we’ll dive into greater detail in the next section. Look a little closer at your battery’s terminals, and you’ll likely see markings like C1, C2, and other similar ones. For example, one battery terminal might have both T and ID markings, which means it connects to the thermistor and is also used for battery identification.īesides that, some terminals are also dedicated to specific cells within the battery. It’s perfectly normal to see a terminal with two markings instead of one. Sometimes, one terminal can serve more than one purpose. Here’s another thing to understand about your drill battery’s four terminals. Shared Terminals and Different Battery Cells The Battery ID terminal: marked as ID, D, or something similar. ![]() The Thermistor terminal: marked with a T, TH, NTC, or something similar.Still, you might come across some other differences like: These two terminals are universally recognizable with their (+) and (-) markings. The exception to that, of course, would be the positive and negative terminals. As a result, you’ll find that those terminals are often labeled differently between different drill battery brands. Now, it’s important to remember one thing at all times: there are no fixed rules about how battery manufacturers must arrange or label those terminals. To connect to different battery cells (more on this below).The four terminals on the battery will serve one or more purposes, such as: ![]() What Are The Four Terminals On A Drill Battery?īefore we dive into why they’re there, it’s essential to understand those four terminals’ purposes. In this guide, we’ll go through everything you need to know about why some drill batteries have four terminals (and, by extension, why some have fewer). However, some batteries also have built-in thermistors, battery identification features, and battery balancing needs that require additional terminals. For starters, two terminals are necessary to act as the positive and negative terminals. In simple terms, some drill batteries require four terminals for their additional safety and efficiency features. Aside from different brands, take a closer look, and you’ll find that some batteries have only two terminals, while others might have three or four! But what’s the difference? Why do some batteries have so many? When shopping for drill batteries, you’ll come across a wide variety of different options. ![]()
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