USB-C Mac laptops will happily take power at seemingly any voltage in the spec. Can plug in a USB-A -> USB-C cable and it will charge overnight at 5V1A, or at l

USB-C Mac laptops will happily take power at seemingly any voltage in the spec. Can plug in a USB-A -> USB-C cable and it will charge overnight at 5V1A, or at least increase endurance during operation. 9V, 12V, 15V, 20V, all good too. I wonder if it will accept anything in-between as well... it should? And where it tops out. Solar panel rigged to a USB-C cable anyone? With ooooolder laptops, I found, as you did, that it's happy to take 12V and buck down everything, but can't boost and wouldn't charge at all. I sometimes use "incompatible" power bricks with a modern Dell laptop and they sometimes top-out of where they'll charge. Probably expecting 20V but getting 16V and not enough to get the cells topped up. Made the mistake of thinking that same modern Dell laptop would take in 5V over USB-C to charge overnight like the MacBook... it did not.