My laptop charges with USB C, so when the standard charger broke, I just used the USB out port from an EcoFlow battery. The display on the battery said the laptop pulled 25-30 watts while charging. So, why can’t I use just any USB brick that can output more than 30 watts?

Is there something that is bound to go wrong that I don’t know about?

Are laptop chargers really that special?

(Edited for clarity)

  • med
    1·
    4 months ago

    Also, be aware that some USB-PD passthrough docks/devices will have enough resistance that it will drop the voltage lower than required for full speed charging. My laptop drops in to a lower power state when connected through a USB-C/PD passthrough dock because the mains voltage is lower than rated.