![power supply - 3 wires on a (bipolar) DC plug - what are they for? - Electrical Engineering Stack Exchange power supply - 3 wires on a (bipolar) DC plug - what are they for? - Electrical Engineering Stack Exchange](https://i.stack.imgur.com/Uaob5.jpg)
power supply - 3 wires on a (bipolar) DC plug - what are they for? - 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
![FRT3H - 90W For Dell Laptop Charger Slim AC Power Adapter - Right Angle - 365PowerSupply.com - Replacement Laptop Power Adapters,Desktop Power Supply & Server Workstation PSU. FRT3H - 90W For Dell Laptop Charger Slim AC Power Adapter - Right Angle - 365PowerSupply.com - Replacement Laptop Power Adapters,Desktop Power Supply & Server Workstation PSU.](https://www.365powersupply.com/wp-content/uploads/2019/09/FRT3H-2.jpg)
FRT3H - 90W For Dell Laptop Charger Slim AC Power Adapter - Right Angle - 365PowerSupply.com - Replacement Laptop Power Adapters,Desktop Power Supply & Server Workstation PSU.
![Amazon.com: 45W Laptop AC Adapter Replacement for Dell inspiron 15 5000 Charger 13 7000 Inspiron 7352 7359 7368 7370 7375 7378 7386 7390 5368 5551 5552 5555 5558 5559 7568 Power Supply Cord Plug : Electronics Amazon.com: 45W Laptop AC Adapter Replacement for Dell inspiron 15 5000 Charger 13 7000 Inspiron 7352 7359 7368 7370 7375 7378 7386 7390 5368 5551 5552 5555 5558 5559 7568 Power Supply Cord Plug : Electronics](https://m.media-amazon.com/images/I/61zIXiWLnkL.jpg)
Amazon.com: 45W Laptop AC Adapter Replacement for Dell inspiron 15 5000 Charger 13 7000 Inspiron 7352 7359 7368 7370 7375 7378 7386 7390 5368 5551 5552 5555 5558 5559 7568 Power Supply Cord Plug : Electronics
![19.5v 3.34a Laptop Ac Adapter Charger For Dell Inspiron P17s001 P11s002 P17f P17f002 P33g002 P37g P37g002 P40f P40f002 P40f001 - Laptop Adapter - AliExpress 19.5v 3.34a Laptop Ac Adapter Charger For Dell Inspiron P17s001 P11s002 P17f P17f002 P33g002 P37g P37g002 P40f P40f002 P40f001 - Laptop Adapter - AliExpress](https://ae01.alicdn.com/kf/HTB1oYsDiuKAUKJjSZFzq6xdQFXaJ/19-5V-3-34A-Laptop-Ac-Adapter-Charger-for-Dell-Inspiron-P17S001-P11S002-P17F-P17F002-P33G002.jpg)
19.5v 3.34a Laptop Ac Adapter Charger For Dell Inspiron P17s001 P11s002 P17f P17f002 P33g002 P37g P37g002 P40f P40f002 P40f001 - Laptop Adapter - AliExpress
![Genuine 5v 6.5a Acp70 Pec Ac Power Adapter Acp075eu Pa1065-050t2b650 For Dell D3000 Xps Docking Station Acp075eu Acp70 Charger - Laptop Adapter - AliExpress Genuine 5v 6.5a Acp70 Pec Ac Power Adapter Acp075eu Pa1065-050t2b650 For Dell D3000 Xps Docking Station Acp075eu Acp70 Charger - Laptop Adapter - AliExpress](https://ae01.alicdn.com/kf/H2982d146628e4588996af402e4074586j/Genuine-5V-6-5A-ACP70-PEC-AC-Power-Adapter-ACP075EU-PA1065-050T2B650-for-Dell-D3000-XPS.jpg_.webp)
Genuine 5v 6.5a Acp70 Pec Ac Power Adapter Acp075eu Pa1065-050t2b650 For Dell D3000 Xps Docking Station Acp075eu Acp70 Charger - Laptop Adapter - AliExpress
![power supply - 3 wires on a (bipolar) DC plug - what are they for? - Electrical Engineering Stack Exchange power supply - 3 wires on a (bipolar) DC plug - what are they for? - Electrical Engineering Stack Exchange](https://i.stack.imgur.com/iPsc1.jpg)
power supply - 3 wires on a (bipolar) DC plug - what are they for? - Electrical Engineering Stack Exchange
![Amazon.com: 45W AC Adapter Laptop Charger Compatible for Dell Inspiron 15 3000 5000 7000 Series 14-5000 13-7000 13-5000 17-7000 11-3000 3583 3593 5100 5570 5558 5559 Series Dell Computer Power Supply Cord : Electronics Amazon.com: 45W AC Adapter Laptop Charger Compatible for Dell Inspiron 15 3000 5000 7000 Series 14-5000 13-7000 13-5000 17-7000 11-3000 3583 3593 5100 5570 5558 5559 Series Dell Computer Power Supply Cord : Electronics](https://m.media-amazon.com/images/I/612lsDD5tHL._AC_UF1000,1000_QL80_.jpg)
Amazon.com: 45W AC Adapter Laptop Charger Compatible for Dell Inspiron 15 3000 5000 7000 Series 14-5000 13-7000 13-5000 17-7000 11-3000 3583 3593 5100 5570 5558 5559 Series Dell Computer Power Supply Cord : Electronics
Solved: Does the AC adapter for the Dell latitude E6540 have a negative or positive polarity? - Dell Community
![Amazon.com: UpBright 4-Pin 5V AC/DC Adapter Compatible with Dell SuperSpeed D3000 WMGHV J22N2 0J22N2 452-11648 452-11646 R47M9 Targus ACP075us ACP70USZ ACP70US Y5T3Y 0Y5T3Y YWDN0 469-4034 332-0446 Power Supply : Electronics Amazon.com: UpBright 4-Pin 5V AC/DC Adapter Compatible with Dell SuperSpeed D3000 WMGHV J22N2 0J22N2 452-11648 452-11646 R47M9 Targus ACP075us ACP70USZ ACP70US Y5T3Y 0Y5T3Y YWDN0 469-4034 332-0446 Power Supply : Electronics](https://m.media-amazon.com/images/I/61ienO2AtsL._AC_UF894,1000_QL80_.jpg)