What do the numbers on the phone charger mean?

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Input 100-120V-50/60Hz, 0.5A

Output 5V-3A/9V-2A/12V-1.5A

Input 200-240V, 50/60Hz, 0.7A

Output 5V-3A/9V-3A/12V-2.25A/20V-1.35A/11V-3A (Max)

I know what V, A, W are and that my charger is a 33W charger. How did they come to these conclusions? Please help

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6 Answers

Anonymous 0 Comments

Chargers used to be very simple. They only took a single type of input (provided by your local power company) and only gave a single output. The company that makes the charger crates a circuit to transform the output of the power plant into the input of your phone is expecting.

As technology got better, they figured out how to take different power plant outputs (depending on your country) into different outputs for different devices. You phone now communicates with your charger to decide what’s the optimal output depending on the battery level (that’s why there multiple outputs).

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