Unsolved
1 Rookie
•
29 Posts
0
65
May 3rd, 2025 18:57
inspiron 14 2-in-1 charge with phone charger?
Inspiron 14 7420 2-in-1
inspiron 14 2-in-1. came with usb-c charger brick.
when traveling, can i charge this computer with my PHONE chager, usb-a to usb-c cable, has 2-A output ? I'd like to charge the computer when it is powered OFF, as i use it infrequently, and can operate it when it is on battery power. so i don't need fast charging. but i don't want to damage the computer. any replies appreciated
No Events found!
anne_droid
3 Apprentice
•
684 Posts
0
May 3rd, 2025 21:32
Hi
First of all the PSU plug in Brick is 65 watts, and an...
3.25 A/3 A
at one of the following voltages....
20 VDC/15 VDC/9 VDC/5 VDC
Ohms Law would have us believe that ....
1000 watts at 250 volts is 4 amperes and 62.5 ohms resistance.
Extrapolate 65 watts / 3.25 (3.0) A is 19.23 / 21.67 volts.
############
My experience tells me that you should not do it, because it may run hot and become detrimental/dangerous.
############
The PSU brick type charger runs at 5 (FIVE) volts, then when connected the device requests the required voltage, when it then switches to that level automagically.
It is NOT recommended to MacGyver stuff like that.
Also below has very little to do with computers, unless you run a desk lamp and monitor etc.
TheMachineCraziness
1 Rookie
•
29 Posts
0
May 11th, 2025 14:42
thanks for reply.
but all i want to really know is if i can use the usb 2A charger, to charge my HP laptop, and not hurt the laptop.
I realize the laptop CAN TAKE more current.
BUT, if the 2A charger is MAXED OUT at 2A, and i plug it into the HP USB-C-IN port, can that charge, even though it is a trickle charge, charge the dell laptop? i would have it in the OFF state, just sitting there, nibbling on power.
i don't care if it takes couple hours to charge, it just saves me fro carrying yet another power brick with me on vacation.
after all, shouldn't USB-C , if correct power output, still charge other usb-c devices? (chargers are not counterfeit, i use brand name chargers, such as samsung, for my phone)
any clarification on that is appreciated,thanks
and have a great day!
anne_droid
3 Apprentice
•
684 Posts
0
May 12th, 2025 09:04
Hi
Dunno.
The usual thing is that USB "C" type chargers output 5 Volts, suitable for a phone, then the more sophisticated ones negotiate with the host to step up to 9, 7.5, 9, 12, 15 even 20 volts to match the wants of the device.
Because you have branded chargers, then they should carry a label listing the input voltage range and output voltages that it's capable of.
You don't mention the spec of the HP, but if you post piccies of the labels and input ports, along with the model(s) of the laptops, then the "Dunno" may become something I do know and state it accordingly.
TheMachineCraziness
1 Rookie
•
29 Posts
0
May 12th, 2025 13:34
thnks for reply, i'll investigate more
re: hp, sorry, it is my dell, my brain is not wrking, my inspiron 14
again, thanks !
TheMachineCraziness
1 Rookie
•
29 Posts
1
May 12th, 2025 15:27
dear Anne-Droid
an addendum - thanks for your replies, and i apoologize for my brain slowness. i went to the charger brick for the dell inspiron, and i now understand about the multiple voltages and output at those voltages.
(I hd to take a picture of it first, to magnify it, to be able to read it !!!!)
i see that my smaller usb phone charger won't work, as it is only single output at the 5V, while the power brick is at multiple volts, and im not sure if the computer needs those voltages, but i won't take a chance, i'll stick with the brick.
thanks very much for your clarification !
nick