All Questions
51
questions
69
votes
5
answers
475k
views
Can I use a charger with more output amperage than the device needs?
I've just bought a portable battery, but the portable battery don't comes with an adapter for the house current; it only comes with a USB cable so I can charge it with my laptop. My mobile phone came ...
8
votes
6
answers
26k
views
Charging a laptop though a USB-C power port with a low voltage/amperage
Let's say we have a new laptop with a USB-C port - like the new Macbook1 or the Chromebook pixel which, yes, are meant to be charged through these ports -, a good solar panel for smartphones (5V 3A ...
- 1,401
6
votes
2
answers
4k
views
Does it use less power to connect to a tethered phone using USB or wifi or bluetooth?
If you are tethering to the internet through your mobile and your notebook is low on power you may want that connection to use the least possible power for your notebook. A USB connection will charge ...
- 254
4
votes
2
answers
2k
views
USB C charging on Dell Inspiron laptop: OnePlus 65W phone charger
I have a Dell Inspiron laptop with a USB C port. The normal charging is 65W adapter via the Dell power (charging port). If I connect this to my OnePlus phone charger which is also 65W somehow it does ...
- 588
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
3
votes
4
answers
7k
views
Does charging a Li-ion battery smart phone through a computer's USB port put additional strain on the battery vs a wall charger?
I was curious about this. I read that you should generally avoid completely discharging and then full charging your Li-ion battery because this can strain the battery (though some suggested doing this ...
- 1,045
3
votes
1
answer
3k
views
Does anyone understand why the G700 mouse charging cable must not be extended?
[Its manual suggests to not use the extension (which is aimed for the receiver) when charging the mouse.]
I wonder why that is.
Here is a photo of it.
You can also find plenty of them on the ...
- 2,596
3
votes
2
answers
218
views
What will happen powerwise if you plug a USB-C device to another USB-C device?
If you have a USB-C phone or tablet and you plug it into a laptop with USB-C, which device gets charged? Or no charging will occur? People charge their phones through their laptops all the time, how ...
- 2,931
3
votes
2
answers
391
views
USB External Battery Packs for devices other than Phones/Tablets
I'm trying to build a wireless/mobile monitor. The monitor will be included in a wheeled cart, so I have some limited storage available in the cavity behind the monitor, but not much. The cart itself ...
- 28.2k
2
votes
3
answers
15k
views
charging a phone via a laptop which is also being charged
Suppose my laptop and my smartphone are both at low battery level and I want to charge up both. I start charging my laptop, and I also connect the phone to the laptop using the usb cable. Is this ...
- 195
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
2
votes
1
answer
3k
views
Charge my laptop/external laptop power bank from usb-output-only power banks?
I want available backup power for my laptop (ASUS ux51vz, 19V/4.74A), I've got a pile of 10-20k mAh power banks, and I'd like a solution to marry the two somehow.
I know that I can get an external ...
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
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
1
vote
3
answers
99
views
Safe to charge USB devices while doing other power-consuming tasks?
I just recently got an iPod, and I completely forgot that without an adapter you have to hook it up to your computer by USB port to charge it, sync, etc. I currently have it plugged into the front USB ...
- 39