Which Is Positive and Negative on Laptop Charger

When it comes to laptop chargers, it's important to know which wire is which. The three most common colors used are black, white, and gray, with each wire corresponding to a different function. The black wire serves as the ground wire, while the white wire is the positive wire, and the gray wire is the negative wire.

But what about plugs? Unlike laptop chargers, prongs on plugs don't have a positive and negative side. Instead, there are "hot" and "neutral" sides. The wider prong connects to the neutral wire, while the smaller one is the hot side of the circuit. It's important to remember that this applies to A/C current.

When it comes to AC adapters, it's important to know which side is positive and which side is negative. The tip of a center-positive connector has a positive polarity, while the barrel or ring has negative polarity. The opposite applies to a center-negative connector. This information should be displayed on the adapter itself.

For chargers, the polarity may be indicated by a sticker on the charger. The dot with a line represents the center pin, which is positive, while the circle around it represents the sleeve, which is negative. If the cord is polarity-reversible, the male and female inline plug and socket will have embossed symbols for positive and negative.

Finally, if you're connecting a charger to a battery, connect the positive (usually red) charger cable to the positive (+) battery terminal and the negative (usually black) cable to the negative (-) battery terminal.

In summary, it's important to understand the different functions of the wires and connectors on laptop chargers, plugs, and AC adapters. Always check for indications of positive and negative polarity, and make sure to connect the appropriate wires to their corresponding terminals.