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
![Dell 130W 240V Slim 7.4mm Pin Laptop Charger Adapter for Alienware, Inspiron 15, Latitude, Precision and Vostro 15 Models with Power Cord - Buy Dell 130W 240V Slim 7.4mm Pin Laptop Charger Dell 130W 240V Slim 7.4mm Pin Laptop Charger Adapter for Alienware, Inspiron 15, Latitude, Precision and Vostro 15 Models with Power Cord - Buy Dell 130W 240V Slim 7.4mm Pin Laptop Charger](https://m.media-amazon.com/images/I/61qnarPG+aL._AC_SS450_.jpg)
Dell 130W 240V Slim 7.4mm Pin Laptop Charger Adapter for Alienware, Inspiron 15, Latitude, Precision and Vostro 15 Models with Power Cord - Buy Dell 130W 240V Slim 7.4mm Pin Laptop Charger
![Amazon.com: 130W AC Adapter Laptop Charger 7.4mm Compatible with Dell Precision M20 M60 M70 M90 M2400 M4400 M4500 M6300 Dell XPS 15(L502x) 17(L702x) Dell Inspiron 15 7000 7559 Dell Docking Station Power Amazon.com: 130W AC Adapter Laptop Charger 7.4mm Compatible with Dell Precision M20 M60 M70 M90 M2400 M4400 M4500 M6300 Dell XPS 15(L502x) 17(L702x) Dell Inspiron 15 7000 7559 Dell Docking Station Power](https://m.media-amazon.com/images/I/61EfST55BUL.jpg)
Amazon.com: 130W AC Adapter Laptop Charger 7.4mm Compatible with Dell Precision M20 M60 M70 M90 M2400 M4400 M4500 M6300 Dell XPS 15(L502x) 17(L702x) Dell Inspiron 15 7000 7559 Dell Docking Station Power
![Laptop Power Adapter Cable Supply 7.9x5.0mm to Slim Square with pin Tip Charger Connector Converter for Lenovo Thinkpad | Walmart Canada Laptop Power Adapter Cable Supply 7.9x5.0mm to Slim Square with pin Tip Charger Connector Converter for Lenovo Thinkpad | Walmart Canada](https://i5.walmartimages.com/asr/c03ec557-21f4-4bd0-ae9b-8f48f072397c.64c604b7e78c39f0772b043b91d7f542.jpeg?odnHeight=2000&odnWidth=2000&odnBg=ffffff)
Laptop Power Adapter Cable Supply 7.9x5.0mm to Slim Square with pin Tip Charger Connector Converter for Lenovo Thinkpad | Walmart Canada
![Compatible Dell Charger Small Pin 65w, Output Voltage: 19.5, Input Voltage: 240.00 at Rs 999/piece in Hyderabad Compatible Dell Charger Small Pin 65w, Output Voltage: 19.5, Input Voltage: 240.00 at Rs 999/piece in Hyderabad](https://5.imimg.com/data5/SELLER/Default/2022/1/ZL/LH/YE/12611023/compatible-dell-charger-small-pin-65w-500x500.png)
Compatible Dell Charger Small Pin 65w, Output Voltage: 19.5, Input Voltage: 240.00 at Rs 999/piece in Hyderabad
![CJP-Geek 4 Pin AC Adapter Charger replacement for Acom Data AcomData HD Power Supply Cord PSU Mains - Walmart.com CJP-Geek 4 Pin AC Adapter Charger replacement for Acom Data AcomData HD Power Supply Cord PSU Mains - Walmart.com](https://i5.walmartimages.com/asr/ccbfc18f-4c5b-439a-ac05-1692a0da16ea.b9907163998f5cba3b079a9795b26c14.jpeg)
CJP-Geek 4 Pin AC Adapter Charger replacement for Acom Data AcomData HD Power Supply Cord PSU Mains - Walmart.com
![Revice Laptop Charger/Adapter for dell PA LA45NS0-00 45w 2.31a Slim Pin 45 W Adapter (Power Cord Included) - Buy Revice Laptop Charger/Adapter for dell PA LA45NS0-00 45w 2.31a Slim Pin 45 W Revice Laptop Charger/Adapter for dell PA LA45NS0-00 45w 2.31a Slim Pin 45 W Adapter (Power Cord Included) - Buy Revice Laptop Charger/Adapter for dell PA LA45NS0-00 45w 2.31a Slim Pin 45 W](https://m.media-amazon.com/images/I/81sMWROG0yL._SY355_.jpg)
Revice Laptop Charger/Adapter for dell PA LA45NS0-00 45w 2.31a Slim Pin 45 W Adapter (Power Cord Included) - Buy Revice Laptop Charger/Adapter for dell PA LA45NS0-00 45w 2.31a Slim Pin 45 W
![Amazon.com: 65W AC Adapter Charger Fit for Dell Inspiron 14 15 5510 5410 5515 5415 5518 5418 3501 3505 Vostro 5510 5515 5415 3401 3405 3501 P106F001 P143G001 Laptop Power Supply Adapter Cord : Electronics Amazon.com: 65W AC Adapter Charger Fit for Dell Inspiron 14 15 5510 5410 5515 5415 5518 5418 3501 3505 Vostro 5510 5515 5415 3401 3405 3501 P106F001 P143G001 Laptop Power Supply Adapter Cord : Electronics](https://m.media-amazon.com/images/I/618S6St6PlL.jpg)
Amazon.com: 65W AC Adapter Charger Fit for Dell Inspiron 14 15 5510 5410 5515 5415 5518 5418 3501 3505 Vostro 5510 5515 5415 3401 3405 3501 P106F001 P143G001 Laptop Power Supply Adapter Cord : Electronics
![Revice Laptop charger for dell 5567, 5568 2.31a 19.5V Pin size 4.5 x 3.0mm 45 W Adapter - Revice : Flipkart.com Revice Laptop charger for dell 5567, 5568 2.31a 19.5V Pin size 4.5 x 3.0mm 45 W Adapter - Revice : Flipkart.com](https://rukminim1.flixcart.com/image/416/416/k9fyky80/laptop-adapter/g/p/h/revice-laptop-charger-for-dell-5567-5568-2-31a-19-5v-pin-size-4-original-imafr8fmwqgw4hyf.jpeg?q=70)
Revice Laptop charger for dell 5567, 5568 2.31a 19.5V Pin size 4.5 x 3.0mm 45 W Adapter - Revice : Flipkart.com
![Dell 19.5V 4.62A 90W 7.4*5.0mm Original AC Power Adapter Charger for Dell laptop European/Asian Standard 6C3W2 DPN-V3KCV FA90PM130 PA-3E 19.5V 4.62A DA90PE1-00 WK890 ADP-90VH B (Dell 90W Adapter) - WIT Computers Dell 19.5V 4.62A 90W 7.4*5.0mm Original AC Power Adapter Charger for Dell laptop European/Asian Standard 6C3W2 DPN-V3KCV FA90PM130 PA-3E 19.5V 4.62A DA90PE1-00 WK890 ADP-90VH B (Dell 90W Adapter) - WIT Computers](https://witcomputers.com/wp-content/uploads/2019/03/7.4mm-5.0mm.jpg)
Dell 19.5V 4.62A 90W 7.4*5.0mm Original AC Power Adapter Charger for Dell laptop European/Asian Standard 6C3W2 DPN-V3KCV FA90PM130 PA-3E 19.5V 4.62A DA90PE1-00 WK890 ADP-90VH B (Dell 90W Adapter) - WIT Computers
![Amazon.com: AC Charger Fit for Dell Latitude E7450 E6510 Laptop Power Supply Adapter Cord : Electronics Amazon.com: AC Charger Fit for Dell Latitude E7450 E6510 Laptop Power Supply Adapter Cord : Electronics](https://m.media-amazon.com/images/I/61BB0SVw-UL._AC_UF894,1000_QL80_.jpg)
Amazon.com: AC Charger Fit for Dell Latitude E7450 E6510 Laptop Power Supply Adapter Cord : Electronics
![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)