Always use the black wire for the negative battery. Never connect the red cable to the negative battery terminal. The red cable is positive, while the black one is negative. Your charger’s three wires carry different amounts of current. And remember, polarity is based on the center pin. What does the difference mean? Read on to learn more. One is the power wire, and the other two are ground. While this is not the case with every laptop, most power bricks have three wires.Each one has a different function but are all grounded.The most common ones are white, black, and red. You may have wondered why your laptop charger has three wires. 3 wire laptop charger wire colors-Why does laptop charger have 3 wires? If you’re not sure which one you need, ask your tech-savvy friend to help you. The white wire, on the other hand, is the positive wire for data signals. The red wire passes positively-charged electric power (five volts), while the black wire is the ground wire. The three wires are the same size, but they are colored differently. If you’re unsure which laptop chargers work with your particular model, you can look at the color code. Which Is Live Black Or Blue In The Electrical Panel?.3 wire laptop charger wire colors-What are the wire color codes?.
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