How much power does a laptop have?

Under normal circumstances, you can tell by looking at the battery. The laptop battery is 12V and has a capacity of 4000mAh. Even if it can only last for 2 hours, then 12V*4A /2=24W, so the power of the laptop is between 20-30W.

Next, let’s take a look at how to check computer power.

What is the power of a laptop and how big is it?

General laptop power should be around 30-50W

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Under normal circumstances, you can tell by looking at the battery. The laptop battery is 12V and has a capacity of 4000mAh. Even if it can only last for 2 hours, then 12V*4A/2=24W, so the power of the laptop is 20-30W. The nominal power on the power adapter only refers to the maximum output that can be achieved. It does not mean that all the power of the notebook must be consumed. Just like the output power of the Three Gorges is several million kilowatts, but no matter how high the power, your 40W light bulb will be used every time. It still only consumes 40 joules of energy per second, and it cannot reach millions of kilowatts. Since the power adapter has heat loss, the input power of the adapter is larger, about 50W.

The above is about How much power does a laptop have and how to check the computer power? I hope it will be helpful to you!