It advertises 45 watts but only puts out about 39 watts so I had to disable the power consumption warning setting in the BIOS on my Dell Inspiron 13 7370. It boots Windows 10, Linux and Mac OS for me Mojave. and it powers everything perfectly and I use it as an extra charger so I don't have to carry it around between work and home. But it doesn't deliver real 45 watts. It stays cool even when running through a USB-C hub and connected to multiple external drives and charging the laptop.
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