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