Powerbank watts meaning. 10W, 18W, 25W, 65W powerbank difference

What is the meaning of watts in case of powerbanks ? What is the difference between powerbank with 10W, 18W, 25W or 65W ?
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The number of watts stands for a total energy that powerbank can output at a given time. For example 18W powerbank can provide 18W for 1 hour, or 1W for 18 hours.

Some larger devices, like laptops may require a higher power supply, meaning you should use a powerbank with more watts.

In other words, more watts also means a faster charge.

Powerbank wattage:
  • 10W are typical for powerbanks with wireless charging
  • 18W are typical for standard powerbanks with wire charging, used for mobile phones, tablets etc.
  • 25W powerbanks allow faster charging of some devices
  • 65W are typical for laptop powerbanks
To calculate a wattage, you have to multiply volts and amperes:

Watts = Volts * Amperes

Advanced powerbanks can automatically change available output voltage and amperage levels.

For example, Baseus 100W powerbank can provide multiple outputs:
  • 5V/3A = 15W can be provided for more than 6 hours
  • 9V/3A = 27W can be provided for more than 3 hours
  • 12V/3A = 36W can be provided for almost hours
  • 15V/3A = 45W can be provided for more than 2 hours
  • 20V/5A = 100W can be provided for 1 hour
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