How does a Dell laptop charger with a pin of the same wattage & specs which fits perfectly into an HP not work because it knows it is not an HP charger
FRT3H - 90W For Dell Laptop Charger Slim AC Power Adapter - Right Angle - 365PowerSupply.com - Replacement Laptop Power Adapters,Desktop Power Supply & Server Workstation PSU.
Solved: Does the AC adapter for the Dell latitude E6540 have a negative or positive polarity? - Dell Community
Genuine Dell LA65NM190 AC Adapter Laptop Charger HA65NM190 65W USB Type C w/PC | eBay