charging interview questions
Top charging frequently asked interview questions
This is a new battery and this gives the problem of Plugged In, Not Charging for the past two days. I have no clue as to why this is happening. Sometimes it does, sometimes it does not. Battery Wear is 8%.
Some times its status is Plugged In, Charging
If someone could please help me diagnose this.
Source: (StackOverflow)
Am I "hurting" my HP laptop by leaving it running, unplugging from outlet - walking a few feet and plugging it back in? My brother-in-law says I am.
Source: (StackOverflow)
When your laptop's battery is 100% charged, should you leave it plugged in so any battery power doesn't get used, or will that cause overcharging, overheating, etc.? Should the laptop be unplugged when the battery level is 100%?
I'm asking because my laptop's screen tends to get dim when unplugged, so I don't like to run it on battery.
Source: (StackOverflow)
I use a Samsung Series 9 laptop running Windows 7.
I notice that when I connect my laptop to its charger, it charges the battery up to 80% and stops there. I believe this is to extend long-term battery life, which is fine with me.
But, if I'm just about to leave my place with the laptop, I'd like to be able to tell my computer "please charge to 100% now, because I'm gonna need it."
Is there a way to tell my computer that?
Source: (StackOverflow)
My Macbook has recently entered a state where the battery no longer charges. Currently the battery is reporting 25% charge when not plugged in. When plugged in, the bar at the top reports (Not Charging), though as long as I keep it plugged in it runs without running down the battery.
Any idea why this happened? And is there a way to fix it without just replacing the battery?
Source: (StackOverflow)
How can I disable a USB port in Windows XP to make it available only for smart phone battery charging?
I don’t want the users to be able to see the USB drive in My Computer, and the USB device should stay disabled in Device Manager.
Is there any way to accomplish this?
Source: (StackOverflow)
I'm using nokia mobile as a modem to connect internet . Now i want to prevent the USB charging feature via my laptop USB port. Because it drains my battery backup quickly while running without AC adapter.
This is not a big issue for Desktop PC or using laptop with AC adapter. But it will help little to save battery energy during power cut.
Is there any way or options to disable USB charging of any external devices from windows level ?
Source: (StackOverflow)
I have a Toshiba laptop that charges while it is off - it charges normally, the battery LED shows orange (charging) as per normal.
However when the charger is plugged in and laptop is on, the power led is off, it doesnt charge. it says "Plugged in, not charging" and battery LED blinks continuously in its orange color.
If the laptop is out of battery and charger is on the power led is on with yellow color (normal).
Any suggestions would be appreciated.
Source: (StackOverflow)
I have some USB 3.0 ports on my motherboard which can deliver up to 900 mA of current I believe. If I plug in a USB 2.0 cable, I can still get up to 900 mA right? I have some devices that uses USB charging and outputs from 1A to 2A but I'm not sure if the cable provided is a factor or not since I'm just using a generic USB cable for this.
Source: (StackOverflow)
This question already has an answer here:
On Windows, is there any way to make some USB ports to be charge-only? I do not want to alter the settings of the devices; I want to change the settings of the USB ports on Windows, so that any device I connect to those ports will be only charged.
Is this possible?
Source: (StackOverflow)
Disclaimer: While this question is about my smartphone and hence may be considered off-topic, I'm hoping the more general issue (which could apply to other USB devices) can be answered in this forum.
My work PC was recently upgraded to Windows 7 64-bit edition.
I have a Palm Treo 680 smartphone and on the previous operating system (Windows XP) it would always trickle charge via USB when I had it plugged in.
However, there is no updated Palm Treo USB driver for Windows 7 64-bit edition, which means I cannot synchronise it via USB (I have to used Bluetooth instead).
One thing I have noticed is that when I plug it in via USB to my Windows 7 computer, it won't even charge. I'm wondering why a valid USB driver would be required for this; shouldn't the charging be occurring at the physical layer of USB, where a driver wouldn't be necessary?
I have a Windows XP virtual machine installed, and when I explicitly "attach" the phone to the virtual machine via the USB menu, it commences charging.
Source: (StackOverflow)
My laptop is almost dead and I do not have the charger. Is there anyway I can DIY a charger for a laptop. Even if it takes 20 hours. To make it clear, I want to send power from a usb port on another computer, or a usb charger to my DC socket. Thanks.
What equipment/steps would I need to accomplish it?
Helpful info:
The battery on my laptop says, 5400 mA 15v. The math turns out to be that a usb port could in theory charge my battery in (5 600 / 500) * 1.2 * 2.2 = 29.56800 hours. if i concider an 80% efficiency. I know that my phone usb charger is 10 times more powerfull then the standard, that means 9 hours, if I pair a couple, then I could have something feaseable.
I have an Asus UL30A
EDIT: after doing the math, i think what I need is something that gives repetitive pulses of electricity powerful enough to charge my battery, given usb obviously does not have the power to do at hand. Think of the theory as filling a bucket with water and then throwing it at someone to make them wake up and not just flinch.
http://en.wikipedia.org/wiki/Battery_charger#Pulse
Note this is not the same as Can I charge a computer through its USB port?; here we're interested in converting USB power from one computer to the laptop's power input.
Source: (StackOverflow)
I have an apple USB AC charger which is rated to provide 5V, 1A output and a Sony mp3 player NWZ B143F.
I don't know the spec of Sony audio player. But I have another mp3 player from Transcend which is rated to take 5V, 1A input voltage. So, is it safe to assume that Sony or for that matter any mainstream mp3 player would take 5V, 1A as input?
Is it safe to use the apple charger with Sony mp3 player?
Source: (StackOverflow)
I have a Sony Vaio PCG 61212W laptop.
Because I got it from India, I needed a Uk power cord. I therefore ordered a power cord which is 3A and 250 volts. But the one I have with me currently reads 2.5A and 250 Volts. Would this cause any harm to my laptop?
Source: (StackOverflow)
I work on a HP laptop plugged in most of the time, and after few months the battery went off-duty.
Of course, I could remove the battery each time the laptop is plugged and place it each time I must move where no sockets are around.
But I think that:
- it would be really BORING!
- The computer would not avail of the useful backup power supply a battery can provide in case of black out.
I think that in 2012, among all the automated tasks a computer can perform, having no built-in charge management software on a laptop is really deplorable for HW houses.
It should simply switch off the battery charging when a safe power level is reached (i.e. 95%) and start recharging it not every five minutes, but only under a certain safe threshold (i.e. 40% - 50%).
In its energy-saving profiles, Windows 7 only allows to set up screen brightness, screen fadeout, screen deactivation and the suspension, not managing any charging issue.
Googling the question I discovered Dell has a "battery life extender" software.
Is there some platform-independent similar software for this task?
Thanks.
Source: (StackOverflow)