I recently bought an aftermarket AC-DC power supply for a laptop which was woefully defective. When connected to a Chromebox, a boot message appeared indicating that the supply could not provide enough power. Although it was enough for a Chromebook to boot, the battery charge was indicated at 22 hours. Both instances were alleviated by using the original HP-branded power supply.
What what I buy that will allow to put a load on these laptop power supplies to both generate a load and also to test the voltage and amps it provides? A readout similar to my bench power supply would be nice such that I can see a digital readout of these values and to see if the voltage drops below spec as the amps increase.
I believe that what I need is a "load tester" but I don't know enough about this kind of equipment to know what it is I'm buying.