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Questions tagged [voltage]

Voltage is the measure of electrical current. This tag should only be used when asking questions related to powering computers and peripheral equipment. It is not for asking about voltage issues related to the commercial supply of power to your home or office.

173 questions
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Hooking up my power switch/reset switch/LEDs

I'm working on building a computer (first time for me). There are several plugs that I need to connect to the motherboard (Power LED, reset switch, etc). Of the two wires, they are either: Color and white (reset switch, power LED, HDD LED) red…
David Oneill
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27
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2 answers

How does Windows detect battery issues?

I have a laptop that's a little over 5 years old, and I've never changed the battery, so I believe Windows 7 when it tells me "there is a problem with your battery", and to consider replacing it. My question is: how does it detect a dodgy battery?…
Cam Jackson
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20
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3 answers

I am in a EU country where it says on the socket 16 A / 250 volt. Can I charge my laptop which takes 100-240 volt / ~1 A?

My laptop started turning off randomly and I thought maybe it's because of this socket.
user7321268
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13
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3 answers

Is it better to use an offset or manually set CPU voltage (with respect to CPU longevitity)?

The Background: I recently built a new computer, and I'm working with the ASUS P8Z68-V Pro motherboard and Intel i7 2600k processor. While this question does not pertain specifically to my hardware, I mention what I have to explain the…
Breakthrough
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12
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3 answers

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, he-he, I assume it is. On the HP website…
Suncatcher
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Got shocked by a native dell laptop charger outputting 19.5 V 6.5 A DC. It was REALLY uncomfortable, but was that dangerous?

Okay. My laptop was running out of battery. I grabbed my charger (outputting 19.5 V 6.5 A DC) which was plugged into the wall, and as I touched the end of the charger I got some electric shock going through my body to my other hand which was…
Noah
9
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3 answers

Mouse rating 1.5V | Can I use a 1.2V rechargeable battery safely?

My mouse rating is 1.5V, I've been using it with alkaline AAA batteries which provide 1.5V. My question is, if I have a 1.2V rechargeable battery, is it going to work anyways without issues? I'm just concerned the 0.3 Volts difference will damage…
Matias
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9
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1 answer

I have a 3.3 Volt PCI ethernet card working on a 5 Volt PCI slot. How is it possible?

This is the design for PCI slots: As you can see, there are 32/64 bits and 3.3/5 Volts. For what I know: 32 bits PCI cards can work in 64 bits slots of the same voltage. 64 bits PCI cards can work in 32 bits slots of the same voltage. I don't…
Sopalajo de Arrierez
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9
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4 answers

Can I have too high a PSU power rating?

I have just ordered a 650 W PSU for my computer which previously had a 300 W, in order to install a more powerful graphics card. However, I didn't check whether anything would blow up because it was too high - could there be any issues? Also, what…
pighead10
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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 11.1V or 10.8V (i.e. 3.7V or 3.6V per cell). I did…
Dejan Govc
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9
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2 answers

Under what conditions will a group-regulated PSU damage a modern computer?

These days, group-regulated power supply design is considered obsolete and is ideally avoided—primarily due to the poor regulation under crossload. For example, Shilka pulls no punches here, and while OklahomaWolf is more subdued in this review it's…
Ash
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1 answer

Charge Apple computers bought in USA to use in Europe

I bought an Apple MacBook in the US and would like to use it in Italy. On the cable, it says: 2.5A 125V. What are the possible solutions to charge my computer? Use an adapter, a plug converter or an electric transformer? Someone can explain to me in…
Hoang Pham
  • 462
8
votes
1 answer

How to detect what wattage that my Windows laptop is receiving via USB-PD?

I don't know too much about USB-PD. I understood that USB-PD requires negotiation between the charger and the receiver. So probably my Windows laptop (Dell XPS 9570) should be able to know the current wattage input it's receiving. Windows probably…
sasawatc
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4 answers

Can computer power supplies use North American 240V (hot-hot-ground)?

Simple question: Most computer power supplies are auto-sensing between 110V/120V and 220V/240V. This begs the question, can they use 240V in North America i.e. connected to both hots (red and black)?
davidtgq
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7
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5 answers

Can I replace my 11.55 V laptop battery with 15.4 Volts

I have an HP 15-CX0056WM gaming it came with an SR03XL battery 3 cells 11.55 volts 52.5Wh The replacement was SR04XL 4 cells 15.4 volts 54 Wh, is it okay to use it? The vendor told me that this is the replacement for my battery.
Firas SCMP
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