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170
votes
7answers
72k views

Should laptops remain plugged in when their battery is 100% charged?

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 ...
22
votes
3answers
36k views

Is there a USB wall charger that “just works” with every device?

Background Almost every gadget today is charged over USB. It seems like a good idea since everyone has a computer with USB, but fumbling behind a computer and making sure that computer is on and does ...
14
votes
5answers
11k views

How can I guess if a USB cable will power my devices?

I've had problems with one long (4 meter) USB Mini-B to USB Type-A cable not being able to boot a 2.5'' external hard disc due to not supplying enough current. On top of that, the cable used a Type-A ...
13
votes
8answers
6k views

Do newer laptop batteries still need to be drained before recharging?

10 years ago when I was doing hardware support it was best practice to fully drain a laptop battery prior to recharging in order to maximize its life. Is this still the case or can a battery now be ...
11
votes
2answers
18k 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 ...
10
votes
4answers
33k views

Why does the USB hub need to be connected with my PC to charge my Droid phone?

I notice that my new Motorola Droid phone charges perfectly fine when I connect it to my computer via the USB cable, or if I connect it to a car cigarette Lighter -> USB adapter, or a wall Power -> ...
10
votes
7answers
17k views

Can I charge USB devices from a powered hub that isn't connected to a PC?

This will probably sound familiar to most of you... In my home, we have a whole bunch of devices that can be charged via USB (two iPhones, a BlackBerry, an iPod Touch, etc ad nauseam). We also have a ...
10
votes
3answers
2k views

Make computer go to sleep after USB phone charging is complete

I used to have my desktop Windows XP pc go to standby (S3 suspend, I think?) when it idled for over an hour or so. Now I charge my iPhone 3GS from a USB port, often right when I go to bed. Ideally I'd ...
9
votes
4answers
5k views

How do I keep a MacBook battery charged to only 70%?

A chemist told me that a battery should be charged to and used between 30-70%, and its very bad for battery life to completely load or unload it. He uses a utility program that always keeps the ...
9
votes
5answers
4k views

How can I make Windows not mount a drive when it is plugged in?

Due to my employer's IT policy, I'm not allowed to have any kind of MP3 playing software on my computer. I do, however, like to plug my iPod into my computer to keep the battery charged during working ...
8
votes
6answers
82k views

Can I charge a computer through its USB port?

Can I charge computers by inducing 5-volt into their USB connectors? Is this possible? I noticed that when my EeePC 900 is off but plugged in charger, there is power coming out of the USB port. Can ...
8
votes
1answer
4k views

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 ...
7
votes
2answers
7k views

Will a mobile phone charge faster if plugged into a USB 3.0 port

Will a phone(or any device for that matter) charge faster if it is plugged into a USB 3.0 port compared to a USB 2.0 port? I know to assist charging you can turn features off(with flight mode) or ...
5
votes
5answers
39k views

Charge a laptop via USB power (500mA)?

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 ...
5
votes
5answers
2k views

Why do you need a valid driver to charge a device via USB?

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. ...
5
votes
1answer
2k views

Set specific USB ports to charge-only [duplicate]

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 ...
5
votes
2answers
6k views

Does a laptop computer charge faster when off?

A laptop power supply can supply a limited amount of power. Conceivably, then, when the computer is running, some of the power must be diverted to the processor and other components, leaving less to ...
4
votes
4answers
11k views

Can I use a charger with less Ampere than the original?

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 ...
4
votes
3answers
13k views

Is it safe to use any USB charger for charging any USB device?

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 ...
4
votes
2answers
141 views

Toshiba Laptop doesn't charge whilst the laptop is in use

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 ...
3
votes
2answers
2k views

Battery plugged in, not charging

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 ...
3
votes
4answers
7k views

Dell Inspiron 6400 indicates the wrong power adapter is plugged in and will not charge the battery

I am using the original power adapter with the Dell Inspiron 6400 laptop and now when it boots up I get the following error message. The AC power adapter type cannot be determined. You system will ...
3
votes
4answers
934 views

Why Apple iPad is not charging from Windows machine using USB?

I am not able to charge an Apple iPad over USB with a Windows machine. But both an iPhone and an iPod charge properly over USB on this machine.
3
votes
2answers
14k views

My netbook battery won't charge (0%) how can I detect what's faulty?

I have read here and there on superuser and it looks like I could have: Faulty recharge circuitry Faulty battery Faulty power adapter How can I be sure to change the right part? The netbook is an ...
3
votes
5answers
266 views

Portable charging device

I have several devices that charge by USB, that I'd like to keep charged at all times. I've used my laptop in the past, put it in the lowest possible power setting, but it still gets hot, and is ...
3
votes
3answers
1k views

Macbook battery no longer charges

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 ...
3
votes
2answers
12k views

How to disable USB charging of external devices in windows 7

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 ...
3
votes
1answer
2k views

Why doesn't my laptop battery charge while the laptop is in use?

Up until a week ago, my laptop has always been able to charge the battery while I'm using it. Now, it will not charge unless the computer is sleeping, hibernating, or turned off. The icon in the ...
3
votes
2answers
736 views

How can I make my Samsung Series 9 laptop charge the battery to 100%?

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 ...
3
votes
1answer
5k views

How to disable a USB port in Windows (XP) and make it available only for charging?

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 ...
3
votes
2answers
12k views

Laptop battery charge management software

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 ...
3
votes
2answers
2k views

HP laptop doesn't charge when it is turned on

I have an HP Pavillion laptop since 2009 February and it recently started to not get batteries charged when it is turned on. What could be the problem? Is it a battery problem or another? Has anyone ...
3
votes
3answers
3k views

Is there a USB hub that can also function as a fully powered USB charger? [closed]

I have several gadgets and a nifty cord setup on my desk that ensures I don't have to connect/disconnect cables; the thing I would love to do would be to keep the gadgets connected overnight (or ...
3
votes
1answer
4k views

How can I charge my laptop wirelessly? [duplicate]

Possible Duplicate: Can I wirelessly charge my laptop? Currently I'm using a wired charger for my laptop and it's boring me to carry that around with me everywhere. I know of the wireless ...
2
votes
6answers
6k views

Is it safe to plug USB devices on 220v wall sockets?

I have an ipod touch and since then I've been charging it on the PC via USB. I just want to know if it is safe to use those wall socket chargers for USB devices? Is it different on every device, or is ...
2
votes
2answers
2k views

Is it safe to use wall-socket -> USB chargers to charge any USB device?

Specifically, the charging unit that came with my HP Touchpad is a wall-plug unit with a female USB adapter on the other side (e.g. this pic on pcmag.com). Will this work for anything that charges ...
2
votes
2answers
9k views

Charging Mobile through Laptop? Any Ill effects?

Is it safe to charge a mobile through a laptop? Are there any ill effects? Can it cause any kind of harm to the laptop and/or mobile? On what factors does it depends?
2
votes
5answers
2k views

Half charged battery improves life time when adapter is used

On my Lenovo laptop, running windows 7, I got a prompt saying that, the system has noticed I am mainly using adapter, therefore I should keep the battery half charged. It justifies by saying, trying ...
2
votes
5answers
9k views

Why won't my Nokia E52 charge on some USB ports

I have two computers. If I connect my Nokia to one of them using the usb cable the charge process will start. If I connect the phone to the other computer (using the same cable!) it won't start ...
2
votes
1answer
3k views

Possible dangers of using a power inverter to charge a laptop

I'm going on a road trip soon and want to be able to use an HP Pavilion dm3 1030us in the car (no, not while driving). I could get an HP Smart AC/Auto/Air adapter but it's coming up on the last ...
2
votes
1answer
7k views

Stop my computer from charging when the battery is full? [duplicate]

I've read online before that if you charge your laptop when it is full, it will eventually "wear out" the battery. Is there a way to stop my laptop from accepting any charge when its battery is over ...
2
votes
5answers
6k views

Can i use one laptop to charge another laptop by connecting the two together with a usb cable?

My Toshiba laptop has a problem with the ac charging adapter. The problem is with the computer and not the charging cord. The geek squad told me that Toshiba laptops have had the same problem in the ...
2
votes
3answers
3k views

Freezing a dead(ish) laptop battery

I have a Compaq CQ50-215CA laptop with a battery that does not properly hold charge. Vista's battery meter does not read the remaining charge left; the laptop will randomly shut down at ~60% and ...
2
votes
3answers
4k views

Should I use laptop while charging? [duplicate]

Possible Duplicate: Is it better to use a laptop on battery or on AC power? Is it Okay to use laptop while charging? Does it have any bad effect on battery or laptop?
2
votes
1answer
344 views

How to determine whether a USB socket is qualified for charging?

More and more devices begin to take advantage of USB sockets as a charger, but sometimes a USB charger does not work because the socket does not have high enough power (output). This usually happens ...
2
votes
4answers
747 views

Apple Magic Mouse quickly loses its charge

three days ago I bought an iMac 21.5 The keyboard has 100% charge, but the mouse has already 87% This is not good. I feel it... What to do in this situation. Anyone has the same problems ?
2
votes
2answers
3k views

Acer Aspire 5532 - Charger problems?

My Acer Aspire 5532 laptop does not charge. I think it is a connectivity issue. It started when the laptop refused to charge unless the power cord/charger was jiggled into a set of random ...
2
votes
1answer
615 views

Why won't my battery stop charging?

I don't know why this is happening but this is a new battery. Details of which are visible in the photo. The problem is that even after the battery meter shows 100%, the power light on the laptop ...
2
votes
1answer
5k views

Can a USB 2.0 cable support USB 3.0 charging?

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 ...
2
votes
1answer
417 views

IBook G4 Charging Problems?

I am having some trouble with my iBook G4. It seems that whenever I plug it into the wall charger that it doesn't charge. It's not the charger's fault. There's a button on the back of it right next ...