Apropos Tech Solutions Corp. Blog

Tag: charging brick

  • 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: laptop power banks

    Some people need their computer battery to last longer between charges. A laptop power bank can be a solution.

    The following is by my understanding and research.

    As I’ve come to see it, a laptop power bank is a particular kind of charging bank. (See my post from Jun 6 about charging banks.) Being intended to charge a laptop instead of, or besides, a phone, the laptop power bank might typically have capacity between one and two times a laptop’s battery. Yet, laptop charging banks are typically are constrained to less than 100Wh because of airline restrictions.

    A working scenario might be like this: a laptop has battery capacity of 50Wh. The laptop power bank to replenish it might be 25000mAh, which translates to a 92.5Wh (see my post from Aug 3). From it, the user might get almost two additional use cycles on the laptop without having to plug into the wall.

    Then, at some other time, the laptop power bank itself will need to be replenished. To do so reasonably quickly, another accessory is needed, called a charging brick, which connects to a wall socket on one end and then to the laptop power bank on the other. Charging bricks are often not mentioned in the context of laptop power banks, but are inherent in the scenario. A fast charging brick may be able to fully recharge a laptop power bank in about an hour. The recharging is done by USB-C PD.

    Charging and recharging speeds of laptop power banks and charging bricks I intend to discuss in a future post.

    Laptop charging banks often have numerous ports, so that a laptop and a phone can be recharged simultaneously.

    Source:

    My Laptop Spares. (Mar 27, 2026). “How To Choose The Right Laptop Battery Capacity.” https://mylaptopspares.com/blogs/news/how-to-choose-the-right-laptop-battery-capacity?srsltid=AfmBOor5KdU74YcRPtfXPFNtuX9I5b_cqXkBydRwLHJ-GTx1USU0xs64

    ca.ecoflow.com

    -js