All Questions
Tagged with power-supply voltage
58
questions
9
votes
3
answers
3k
views
Is it safe to replace a 11.25V laptop battery with 11.1V or 10.8V?
I need a replacement battery for an older laptop that originally came with an 11.25V Li-ion battery (presumably 3 cells at 3.75V each).
The batteries I found online mostly have a nominal voltage of 11....
- 161
0
votes
1
answer
75
views
Can a loosely connected PSU damage a laptop?
is it a bad thing that the cable connects to the power adapter block in a laptop power supply comes loose and is left alone while the laptop is under use (as shown in the picture)? I am worried it ...
- 21
0
votes
2
answers
1k
views
What could be causing this erratic power/voltage behavior with USB ports on a desktop PC?
In short, I am having issues with what looks like to be power management of USB devices by my computer. I have had the following symptoms pretty much since I bought it in November 2021.
When I connect ...
- 123
1
vote
0
answers
125
views
PC sometimes turns on and sometimes not with different outlets
When the Pc is plugged to an outlet and I press the on button, it will sometimes turn on. when the pc is on and goes into sleep mode, it won’t turn back on again. I tried replugging the cord to same ...
- 11
0
votes
1
answer
628
views
The purpose of PSU & motherboard -12V line
Typically PSUs have -12V line rated about 0.2 - 0.5A. But for what is it used?
Is it used for example with one of the +12V lines to get total 24V?
What component or so needs that -12V or possibly 24V?
- 105
12
votes
3
answers
30k
views
How can I detect the USB-C power delivery voltage?
I have an HP laptop which I charge with a USB-C charger through the USB-C port. I have no idea which power delivery (PD) version it has and if it's PD-compliant at all. However, as the charging works, ...
- 1,345
0
votes
1
answer
573
views
Server power requirements
The computers that I’ve been exposed to only require a typical American 120 volt outlet to the PSU. From what I understand, depending on the homes electrical layout you’re limited to about 15 amps, ...
0
votes
0
answers
94
views
low voltage POST only means battery problems?
No doubt the watch battery on the motherboard long since lost its juice.
However, I'm not quite sure what error I saw on boot, I think it was before POST and I think it mentioned "low voltage&...
- 1,650
1
vote
1
answer
868
views
Can I use a power supply with different input/output voltage for router?
I bought a Verizon g3100 router; it did not come with its external power supply. The needed cord has an input of 105-125v ~ 60Hz 1.5a and output 12v 3.5a.
I can't find exact cord anywhere but I ...
0
votes
1
answer
155
views
How to replace my power supply safely?
If something is powered from a 9 V and 1 A supply, you can replace it with a 9 V and 1 or more amp supply. How would one calculate if it is safe to replace it with a less voltage and less amperage ...
- 101
0
votes
0
answers
1k
views
12v line is showing up to 14v in BIOS (DMM reading are fine)
Purely by chance, upon rebooting, in the BIOS, I saw that 12v line was showing 13.9v, although I used the computer normally all day long.
After resetting all settings in the BIOS and reboot, nothing ...
0
votes
2
answers
5k
views
can i power a device with more output amperage than the device needs? [closed]
I just brought a speaker that runs on 12v power supply. So i want use it on my car.
Can i power a speaker with a car battery 12v directly?
Speaker input: 12V, 1.25A
Car battery output: 12V
3
votes
0
answers
216
views
PSU voltage and microfreezes
A week ago, my PC started exhibiting a problem. When scrolling in a web browser or trying to game, microfreezes happen randomly.
The PSU is five years old, and some of the voltages look out-of-spec, ...
0
votes
0
answers
43
views
What do I need (powerwise) to plug my French gamer PC in Canada
I read on metastack that superuser is the place to ask hardware related stuff, hope it fits.
I recently move from France to Canada and I'm going to get my gamer PC shipped soon.
What will I need to ...
- 101
1
vote
2
answers
11k
views
Okay to supply more amps? Use a 14V 4A 56W power adapter on a 14V 3.21A (45W) monitor?
I have a Samsung 4K monitor, LU28E510DS/ZA (Costco exclusive variant), with a back panel describing DC14V 3.21A.
I cannot find an exact replacement power supply. I found one that is close at 14V 3A ...
- 936