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Tekcharze 19.5V 3.34A 65w Replacement Laptop Adapter/Charger Octagon Pin 7.9 x 5.0 mm for Dell Inspiron 1545 1750 1440 1318 1546 XPS M1330 M1530 PP41L PA-21, Black (Power Cord Included) : Amazon.in: Computers & Accessories
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power supply - 3 wires on a (bipolar) DC plug - what are they for? - Electrical Engineering Stack Exchange
![laptop - Hacking Dell charger to run directly from an external 19.5V power source - Electrical Engineering Stack Exchange laptop - Hacking Dell charger to run directly from an external 19.5V power source - Electrical Engineering Stack Exchange](https://i.stack.imgur.com/IIC6A.png)
laptop - Hacking Dell charger to run directly from an external 19.5V power source - Electrical Engineering Stack Exchange
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
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