Any way to use a dell adapter on hp

JMak

JMak

Yeah.. I am at it ;)
Adept
Hi
I have got a dell adapter which I intend to use on an hp device..the HP adaptor is a generic one which I am a bit reluctant to use as of now, though it's giving proper voltage but still... (65w)

Though the pin is similar but still I guess there is some internal circuit that identifies the socket and hence the device.. That's why with the dell pin there is no power to the HP device..
Any way to use the Dell pin without cutting and replacing with hp one...?

Is there any small converter out there or some other hack..

Here are a couple of pics of both the pins, top one is dell and bottom one is HP. .

Thanks
 

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n1r0 said:
Do both plugs have the same polarity?
Click to expand...
I am not that savy, just checked using a multimeter, no idea about the polarity..
But if this helps both pins can be checked via outside and corresponding inner circular part..
 
There is a separate control signal through a 3rd wire, which is why it is not working as-is. This control signal is used to determine if the charger is genuine or supported etc. Even if you swap the connectors it may not work.

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nRiTeCh said:
Should work if ratings match and of course the pin type too.
Click to expand...
That's what I thought until I found this...
And tbh i dont think without opening it and doing some hardware changes it's possible...
Until as usual some great guy around here opens my eyes and proves me wrong...
 

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JMak said:
I am not that savy, just checked using a multimeter, no idea about the polarity..
But if this helps both pins can be checked via outside and corresponding inner circular part..
Click to expand...
Connect the adapters to mains, put the multimeter in voltage mode, hold the red lead of the multimeter to the center pin, hold the black lead to the outer shell. If the voltage reading is positive i.e 19V, then the center pin is positive and the outer shell is negative. If the voltage reading is negative, like -19V, then the center pin is negative and the outer shell is positive. Most power adapters are center positive, but it is a good idea to check.

Did you make sure that both power adapters are rated for the same output voltage? The dell adapter must have the same output voltage and equal or greater current rating as the hp in order to work. Just read the stickers on them.
 
variablevector said:
Connect the adapters to mains, hold the red lead of the multimeter to the center pin, hold the black lead to the outer shell. If the voltage reading is positive i.e 19V, then the center pin is positive and the outer shell is negative. If the voltage reading is negative, like -19V, then the center pin is negative and the outer shell is positive. Most power adapters are center positive, but it is a good idea to check.

Did you make sure that both power adapters are rated for the same output voltage? The dell adapter must have the same output voltage and equal or greater current rating as the hp in order to work. Just read the stickers on them.
Click to expand...
That's the strange part, none of these give the proper 19.5v ratings when the outer shell is touched from outside and the inner pin...

Both these give readings when outer shell is touched from outside and from inside... The pin it seems is the shabab mein haddi ( must be the identifying terminal in both)

It seems on these plugs the outside shell and corresponding inside shell are the two power terminals
 
JMak said:
That's what I thought until I found this...
And tbh i dont think without opening it and doing some hardware changes it's possible...
Until as usual some great guy around here opens my eyes and proves me wrong...
Click to expand...
As far I remember, I used a single charger across acer, dell and hp couple of yrs ago and it worked fine.
 
JMak said:
That's the strange part, none of these give the proper 19.5v ratings when the outer shell is touched from outside and the inner pin...

Both these give readings when outer shell is touched from outside and from inside... The pin it seems is the shabab mein haddi ( must be the identifying terminal in both)

It seems on these plugs the outside shell and corresponding inside shell are the two power terminals
Click to expand...
Yep, your intuition was right. I did some googling and it seems the center pin is a data pin used to authenticate if the power adapter is genuine dell or not. It uses a chip that communicates over serial with the bios. That's unfortunate because it seems hp/lenovo just place a specific resistor on that pin to authenticate, which would be a easy fix if you have a soldering iron.

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Unless there's someone selling something that can spoof this protocol, you're probably stuck.
 
variablevector said:
Yep, your intuition was right. I did some googling and it seems the center pin is a data pin used to authenticate if the power adapter is genuine dell or not. It uses a chip that communicates over serial with the bios. That's unfortunate because it seems hp/lenovo just place a specific resistor on that pin to authenticate, which would be a easy fix if you have a soldering iron.

hackaday.com

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If you’ve ever had a laptop charger die, you know that they can be expensive to replace. Many laptops require you to use a ‘genuine’ charger, and refuse to boot when a knock off m…
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Unless there's someone selling something that can spoof this protocol, you're probably stuck.
Click to expand...
Yep, seems so..
Lets see if someone has one to dispose in the forum, otherwise will have to search the market for a deal.
Thanks for the time guyz
 
There are third-party power adapters that mimic the behavior of the third, central data pin.
Many Mini PC sellers often bundle third-party power adapters, and they work without triggering any "inadequate" or 'non-genuine Dell accessory' warnings, which can throttle performance.
 
alap4m said:
There are third-party power adapters that mimic the behavior of the third, central data pin.
Many Mini PC sellers often bundle third-party power adapters, and they work without triggering any "inadequate" or 'non-genuine Dell accessory' warnings, which can throttle performance.
Click to expand...
I have one it's generic with a HP sticker and gives roughly 19.3V, that's what I was using to compare the pins... I guess i ll have to use it for now...
 
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Dell is using this since at least 2010 & another fun fact, dell laptops of that time (not sure about recent ones) would downclock the processor if it detected adapter is not genuine dell but generic one so even if it charges the battery you still lose performance in the end because of slower processor.
 
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