78
votes
Accepted
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?
The Wikipedia page Mains electricity by country doesn't list any countries with 250 V mains. That's probably socket's max voltage rating. It doesn't mean actual voltage is 250 V.
16 A is max current ...
- 57k
21
votes
Got shocked by a native dell laptop charger outputting 19.5 V 6.5 A DC. It was REALLY uncomfortable, but was that dangerous?
It's unlikely it was a placebo, if you felt it well enough to be able to say things like the path it took through your body. I certainly don't wish to worsen your fears (though honestly, a little ...
- 328
18
votes
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?
There are two parts to this question. The first part questions the labeling of the plug, and the second, the labeling of the computer power supply.
As to the plug:
(16A) This is the receptacle ...
- 181
12
votes
Accepted
USB-C Chargers: Is it safe to charge a phone with a laptop's power supply?
Type-C original specifications (and Power Delivery specifications over Type-C connector, if any) are designed precisely for the sake of compatibility and inter-operability. Since both Type-C devices ...
- 12.7k
11
votes
Accepted
Is it safe to replace a 11.25V laptop battery with 11.1V or 10.8V?
First, the ratio between 11.25 V and 11.1 V is only 1.3% ,and between 11.25 V and 10.8 V, 4%. The first is insignificant, well within tolerance of most electronic parts. The second implies a small ...
- 29.7k
10
votes
Lenovo Trim Yellow rectangular power adapter
Quick explanation
This image seems to point to the internal plates being connected internally, with the outside as a 0v line
In depth explanation
As the two plates are connected, which plate is on ...
- 488
10
votes
Accepted
How can I detect the USB-C power delivery voltage?
You may try the Nirsoft
BatteryInfoView:
BatteryInfoView is a small utility for laptops and netbook computers that displays the current status and information about your battery. The displayed ...
- 481k
10
votes
How can I detect the USB-C power delivery voltage?
I use a USB-C breakout board and a voltmeter. If you have Windows though, harrymc's answer is easier.
- 338
8
votes
Can I replace my 11.55 V laptop battery with 15.4 Volts
The replacement must have the same voltage (within very small limits). The vendor is incorrect. Take your business elsewhere.
Every place selling these batteries tells you these are not ...
- 63.1k
8
votes
Accepted
Can I replace my 11.55 V laptop battery with 15.4 Volts
This same question was presented in the post
Battery Upgrade Hp Pavilion gaming 15-CX0056WM:
Hello! i want to know my laptop came with a 52Wh battery SR03XL.
this same laptop also comes with SR04XL ...
- 481k
8
votes
Is it safe to replace a 11.25V laptop battery with 11.1V or 10.8V?
These are most likely the same type or very similar. The voltage of a lithium-ion or lithium-polymer cell varies from about 4.2V when fully charged, down to 3.2V when fully discharged. There isn't &...
- 424
6
votes
Under what conditions will a group-regulated PSU damage a modern computer?
The issue is specific to certain Haswell-based system configurations.
Haswell introduced new, extremely low-power states called C6 and C7. The processor virtually shuts down in these power states, ...
- 46.1k
6
votes
Are all DDR3L (1.35V) DIMMS safe to use in a computer system that uses DDR3 (1.5V) DIMMs?
Micron have an interesting Tech note where they say the following:
Micron 1.35V DDR3L and DDR3L-RS devices use the same die as 1.5V DDR3 devices, but have been separated during the test screen and ...
- 726
5
votes
Accepted
How do I check the mAh or Voltage for my laptop battery?
You can use HWMonitor - http://www.cpuid.com/softwares/hwmonitor.html
It will give you detailed battery info:
- 3,725
5
votes
Accepted
The purpose of PSU & motherboard -12V line
In short, it seems -12V is mainly still there because it's part of the ATX specifications and for backward compatibility.
Also see this question on electronics StackExchange: What is the use of ...
- 1,221
4
votes
Accepted
Is it bad to put 3.7V on 3V mice?
While a fresh alkaline cell would typically have an open circuit reading of a little more than 1.5v leading to a series pair producing more than 3v, this would never be as high as 3.7v in practice.
...
- 160
4
votes
3.3v rail randomly going low after a period of use
That means your power supply failure. For different voltage, is provide power for different hardware component, so it doesnt matter if 5V and 12V is stable, your computer will still reboot when 3.3V ...
- 1,524
4
votes
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?
The simple answer is this:
Your laptop can be charged using this socket
Switches/sockets list the maximum current and the maximum voltage they can support without burning out (i.e. - safely and ...
- 41
4
votes
Can I use different laptop charger- similar Voltage, higher Ampere?
Yes, as long as the voltage is the same and amperage is more than required, the laptop charger will work (assuming the plugs fit)
- 4,315
4
votes
Accepted
Can I use different laptop charger- similar Voltage, higher Ampere?
Assuming they're both genuine Lenovo chargers with the same connector, the answer is most likely yes.
Case in point: my HP ENVY x360 13 shipped with a 45W adapter. It'll charge on a separately-...
- 46.1k
3
votes
Accepted
Okay to supply more amps? Use a 14V 4A 56W power adapter on a 14V 3.21A (45W) monitor?
TL; DR: Your / Leo Notenboom's assumption ("Voltage is pushed, Amperage is pulled") is correct, but there are more things to take into consideration than just Volts and Amperes: polarity and connector-...
- 2,720
3
votes
Accepted
One laptop charger for laptop and monitor?
The brick which are calling a "charger" is not actually a charger. It's an AC to DC converter. Monitor and the laptop each have their own built-in charge controllers (and do those special things ...
- 485
3
votes
Under what conditions will a group-regulated PSU damage a modern computer?
My addition to the answer by @bwDraco :
In a group regulated PSU, the voltage regulation is poor and that may shorten the life of your hardware, even if it is within specification.
A group regulated ...
- 481k
3
votes
Accepted
Increase voltage on PCI serial port
I fear answering this question because it is kind of a product recommendation, which is off topic.
Your assumptions are correct, and RS232 states that the voltage for signalling is roughly 3v to 15v (...
- 6,528
3
votes
Accepted
Laptop Power Supply Modification
Don't do it, as it's far easier to purchase one of these http://www.amazon.co.uk/dp/B0144DCH68 - I guarantee it will have an adapter to fit - they can easily be changed over on a charger like this.
- 3,508
3
votes
can i power a device with more output amperage than the device needs?
You need to check voltages and polarity carefully, but to directly answer your question, yes. Current is drawn, not pushed. So the speakers will use the current they require and not more.
- 50k
3
votes
How can I detect the USB-C power delivery voltage?
Sounds like you need a USB-C PD power (voltage and current) monitor, although it, rather unfortunately, has a USB-A output:
A - Power input via USB C plug- connects to supply USB C socket such
as ...
- 2,325
2
votes
Can computer power supplies use North American 240V (hot-hot-ground)?
The neutral wire needs to be isolated from the ground in UL listed devices. If it was not isolated, then some current could flow through the ground wire. This would cause a GFCI breaker to trip when ...
- 21
Only top scored, non community-wiki answers of a minimum length are eligible