Using USB A cable for charging a laptop



  • I just ordered a new laptop which supports charging from USB C like many modern laptops, but it also supports charging from it's USB A port.

    2 Thunderbolt™ 3 (40Gbps signaling rate) with SuperSpeed USB Type-C® 10Gbps signaling rate (USB Power Delivery, DisplayPort™ 1.2, HP Sleep and Charge); 1 SuperSpeed USB Type-A 5Gbps signaling rate (HP Sleep and Charge); 
    

    I can obviously use USB C to charge, but as more devices adapt to USB C, it would be nice to be able to use the USB A port as well. Especially since I already have a few high speed chargers that have USB A female.

    So what type of cable do I need?

    I would think something like this would work, but it doesn't

    https://www.amazon.com/AINOPE-Rupture-Double-Compatible-Enclosures/dp/B07YSNFNKD/

    b4f306e8-871f-4d5d-b571-da2883ac9d4f-image.png



  • The USB cable has nothing to do with it.

    But I'm not sure it is what you think it is. HP Sleep and Charge is for charging phones etc from the laptop while the laptop is off. Not for charging the laptop itself.



  • I'm not sure how the Q/A really answers your question. The answer listed assumes the laptop can't charge off USB A, at least that's how I read it.

    That said, I've never heard of charging a laptop off a USB A, only USB C or the standard dedicated power port.



  • The HP specs:
    b69c16c5-fd32-4961-9979-3b971b50fed9-image.png

    it mentions HP Sleep and Charge on the USB A port - same as they do for USB C port.



  • The USB cable has nothing to do with it.

    But I'm not sure it is what you think it is. HP Sleep and Charge is for charging phones etc from the laptop while the laptop is off. Not for charging the laptop itself.



  • @Pete-S said in Using USB A cable for charging a laptop:

    The USB cable has nothing to do with it.

    But I'm not sure it is what you think it is. HP Sleep and Charge is for charging phones etc from the laptop while the laptop is off. Not for charging the laptop itself.

    Agreed - I'm guessing the infrastructure is not there to charge the battery via USB A, only from USB C.



  • One reviewer of the laptop mentioned

    It uses a neat little trapdoor design that expands to accommodate the larger USB-A cable, collapsing down to a smaller size when not in use. You still get two USB-C ports, and all three can be used for charging the machine, though the included charger is USB-C.
    

    So not sure if it's just speculation like I had or if you can actually charge from it. Although I have never heard of anybody doing this.



  • Ok HP clarifies and said USB A is not powerful enough to deliver a meaningful charge.

    https://store.hp.com/us/en/tech-takes/3-different-ways-to-charge-laptop-without-charger


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