Apropos Tech Solutions Corp. Blog

Tag: usb c cables

  • Accessories: charging cords, usb c to usb c, part 2

    Charging devices, usb c to usb c: 100W?

    The following is by my understanding.

    I mention usb c to usb c charging cords in my post from August 14. I realized I needed some heavy-duty charging cords that could handle 100 or 140W.

    I bought an extra 60W one (pretty standard, as I understand), then one rated at 100W, and another one rated at 240W.

    A day or so later, the opportunity came to try out the cords: what wattage would they actually deliver? Moreover, how would the devices respond to them?

    It turns out the laptop will only charge at around 45W via usb c, so a normal 60W cord will suffice to recharge it from the power bank. However, the power bank itself is rated to receive up to 140W via usb c for recharge, which the charging brick can deliver. Therefore, I connected each, at its appropriate usb c port, to an end of the 240W-rated usb c cord.

    Using that cord, the power bank would only accept 100W, not more.

    It seems any usb c device might have its own mind that decides what charging rate it will accept. I guess that’s to protect the device(s) involved.

    Source:

    Ask Leo! (Oct 23, 2025). “USB Charging and Cables Explained: Safe and Simple.” YouTube. https://www.youtube.com/watch?v=jD54dscsefw

    -js

  • Accessories: charging cords, usb c to usb c

    Charging a device, a cord is often needed. What are some considerations about charging at a usb c port?

    The following is by my understanding.

    This post is connected to my post from August 11 about laptop power banks, etc.

    Herein, “cord” and “cable” are used interchangeably.

    The charging brick and laptop power bank arrived. Neither came with a cord. I plugged the charging brick to the wall. Then, I connected the charging brick to the laptop power bank via the usb c cord I use to charge my phone.

    The laptop power bank’s display lit up. It indicated charging happening at around 56W. Yet, the charging brick could deliver 140W, and the laptop power bank could also receive 140W.

    I’d read that a particular specification of charging cord is needed beyond 60W; here was proof. It seems that basic, standard usb c to usb c cable allows up to 3A. Caveat: some usb c to usb c cord may not be made to that standard, so won’t even accommodate 3.0A.

    So, the laptop power bank was charging fine at just under 60W, but the charging brick could deliver 140W, and the laptop power bank could accept 140W as well. The limitation seemed to be the cord: it just couldn’t handle past 60W.

    I went out yesterday, seeking usb c to c charging cords. Serious ones have ratings on the packaging, by Watts and/or Amps. I bought one rated at 100W and one rated at 240W, around ten dollars each. Then I bought a “normal” usb c to usb c cable, rated for 3A, 60W.

    I haven’t had a chance to try out the 100W or 140W cables because right now everything is charged. However, I plan to follow up when the opportunity arises:)

    Source:

    Cherchian, R. (Aug 2, 2025). “USB-C Cable Types Explained: Speed, Power, and Video Differences.” YouTube: https://www.youtube.com/watch?v=guegsQSZYD4&t=64s

    -js