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I've been digging around for a few weeks now and I've been unable to find a powerbank to support my Thinkpad so I can be "off grid" longer than a couple hours.

The specs I'm looking for seem pretty standard:

  • Lots of juice (~50,000mAh)
  • USB-C out at a level capable of supporting my Thinkpad, which requires (I think) 65W.
  • Passthrough charging.
  • Must be permitted on a plane as a carry-on.
  • USB-C in for fast charging would be nice.

What I've found so far are a lot of things that appear to be trying to look like the above, but fall short in critical areas:

  • USB-C used for charging the powerbank only, with standard USB-A ports for outgoing.
  • USB-C out is available, but only at a power level capable of charging phones.
  • Support for charging a laptop, but only by way of a standard AC outlet on the powerbank, so I have to cart around my adapter (which presumably wastes energy to do the conversion).

I feel like this should be an easy, solvable problem, that I should be able to run a 2-sided USB-C cable from the powerbank to my laptop, so maybe I'm just not looking in the right place? Am I missing something that makes this sort of request fundamentally impossible or prohibitively expensive? I'm just wanting to know if I'm looking for something that doesn't exist.

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    AFAIK, that combination is not possible, because you can only carry a battery on a plane that is less than 100Wh (+- 27000 mAh)
    – Irsu85
    Jun 19 at 7:54
  • And if a phone powerbank supports 65W charging usb-c, your laptop should also support it
    – Irsu85
    Jun 19 at 7:55
  • It may just be easier to have two large batteries and a docking hub. I know it may not be the most elegant, but it's better than having a laptop die on you. Jun 21 at 6:23

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