All Questions
51
questions
1
vote
2
answers
3k
views
Charge laptop with USB PD at 20V even if it draws less than 45W?
I want the possibility to charge my Laptop (19V/3.42A, Acer Aspire 5 A515-52G) from a power bank. Since my laptop only has the ordinary barrel power connector but power banks usually come with a USB-C ...
- 45
0
votes
2
answers
46
views
My mouse, just says Microsoft on the bottom, and doesn't work
I changed the mouse batteries a few days ago and the mouse has not been working. I don't know the specific model or type of mouse. It is wireless and there is a USB connector in my computer. The ...
0
votes
1
answer
365
views
Safe? ..Using a Y USB cable to power a dash cam from 2 power sources [closed]
I would like to power a dashcam from 2 power sources (the car cig lighter & battery pack) using a Y-USB cable (1 female - 2 male). I would connect my dash cam to the female end. Then plug one of ...
- 1
0
votes
1
answer
245
views
Can I charge a simple Nokia phone which has USB input (5V=450mA) with a 5V=2A/7V=1.8A/9V=1.8A/12V=1.3A supply? [closed]
I have a Nokia Asha 501 Dual Sim phone which comes with the power supply as stated in the title. It recently broke, and I decided to test if the phone's USB port which I thought was only for data ...
- 1
1
vote
2
answers
1k
views
USB A to C cable with USB 2.0 charger, low current
Note: this is not about a specific device but the general aspects of charging a USB device using accessories with different USB standards so I hope this fits here.
I've got a Samsung Galaxy ...
- 125
4
votes
2
answers
597
views
Can phones/tablets avoid charging from USB power?
I know that some laptops (e.g. Lenovo ThinkPad) have user-controllable software to disable battery charging even when AC power is plugged in. This feature takes precedence.
When a typical mobile ...
- 720
0
votes
1
answer
179
views
How to charge an usb-c equipped laptop from a powerbank
I have got a laptop that can only be charged via usb-c.
I also have a powerbank (45000mA) that not only has usb outputs, but also an output (up to 20V) for laptop charging. It came with 11 adapters ...
- 15
2
votes
1
answer
52
views
How do capacity meters on USB drives if there is no battery or power source in the drive itself?
Some USB flash drives, such as the Lexar JumpDrive M10, have some sort of capacity meter on them, indicating the space left on the USB flash drive even when it is unplugged.
How does that work exactly?...
- 23
1
vote
1
answer
1k
views
Could overvolting the USB port on a laptop cause battery drain issues?
So yesterday I was working on a project with an Arduino Mega. The Arduino was being powered with a 9V battery plugged into the 5v and GND pins on the board. I needed to make some changes to the code, ...
- 111
1
vote
2
answers
602
views
What does a USB stick do on a powered USB port when PC is turned off?
There are USB ports that are powered, even if the Laptop is turned off. AFAIK, those ports have yellow color or they have a USB icon and a battery icon.
It's clear to me that I can e.g. load my phone ...
- 6,085
1
vote
0
answers
60
views
USB mouse switched off when laptop on battery and temperature rises
My USB mouse is disabled when my laptop is running on battery power
and the CPU or GPU temperature rises.
It enables the mouse when the temperature is down
or when I plug in the laptop power cable.
...
- 11
0
votes
1
answer
2k
views
How do I join two USB power sources without blowing anything up? [closed]
I want to have a portable battery that I can charge either with a solar panel, or with a wall outlet. I'm lazy, so I don't want to manually switch any cables to make this happen. Also, the goal of ...
- 1
0
votes
1
answer
2k
views
USB Power consumption in standby v. active
I am trying to work out a power budget for a battery powered device i am making.
I have a USB hub with 4 ports. Each port has a device that needs communications (that is, none of them are for ...
0
votes
1
answer
91
views
How to connect a camera to a Windows PC for charging only?
I have a Xiaomi camera and I want to connect it to Windows PC for charging, but I want the camera to be turned on. There is a feature that you can have the camera enabled without battery - when the ...
- 105
0
votes
1
answer
664
views
Will 14.5 v @ 2.0 Amps harm my MacBook 12
I'd like to charge my MacBook 12 using my PowerBank. I have a PowerBank with adjustable voltage control it has USB output too. Though when I use USB output it draws only 0.5A @ 4.75V on average and ...
- 103