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this post was submitted on 20 Jul 2024
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As long as it supports the USB-C PowerDelivery standard and has the supported voltages and wattage needed to do so. Most laptops will need 20v.
For chargers as small as those little phone-bricks the main problems would probably be the wiregauge of the USBC cable and the heat. Being so small and without exhaust vents I imagine the poor little charger would be at risk of early heat death. But it's doable
I've been able to normal-charge a 15 inch IdeaPad 82R9 using a little 1x1 inch 35watt GaN charger. But this was with the CPU locked to not go over 25% load(this laptop is FAST even with this sacrifice) and it makes that little charger get pretty hot. Without that CPU limit in place it actually drains faster than the charger can charge.
Modern GAN chargers can handle 65w in a pretty small charger though.