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Questions tagged [charging]

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237
votes
6answers
183k 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 ...
62
votes
4answers
10k views

Unplug laptop while it is running

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.
54
votes
5answers
280k 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 ...
48
votes
6answers
71k 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 ...
32
votes
6answers
6k views

Do DC adapters consume energy when no device is drawing DC current?

Do DC adapters consume energy when no device is drawing DC current? Or… Can I leave my mobile (5-20 W) or laptop (40-60 W) chargers plugged in and switched on and hope they won’t draw current if my ...
25
votes
4answers
49k 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 ...
24
votes
4answers
53k 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 ...
17
votes
2answers
28k views

USB Type C Power Delivery Profile - max length?

The new USB-C connector allows for 100W to be delivered to charge laptops etc. Is there a maximum length for a charging only cable? The specification talks about cables being less than two meters ...
17
votes
5answers
16k 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 ...
15
votes
6answers
230k 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 ...
14
votes
8answers
42k 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 ...
14
votes
4answers
55k views

Can I use a USB hub to simultaneously charge a tablet and connect a USB drive? [duplicate]

What I do have (default way of charging tablets: A) vs. what I want to have (B or C): Can I have it? It’s a simple thing, so why not? How else can I use a tablet together with a portable hard disk (...
13
votes
8answers
10k 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 ...
12
votes
4answers
37k 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 -> ...
11
votes
1answer
3k views

Will a USB 2.0 device charge faster plugged into a USB 3.0 port? [duplicate]

Fairly simple question, do USB 2.0 devices charge quicker if they are plugged into a USB 3.0 port rather than a USB 2.0 one. I’m not asking about a specific device I have, I just mean in general. I ...
11
votes
3answers
27k 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 ...
10
votes
6answers
15k 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 ...
10
votes
9answers
144k views

Laptop Brightness dims when charger is unplugged(no solution)?

Hello yesterday i bought DELL Inspiron 15 (3542) win 8.1. And noticed that if charger is plugged on, screen becomes brighter, and after unplugging dimmer. Of course i tried adjust screen brightness, I'...
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 ...
8
votes
5answers
85k views

Charge a laptop via USB power (500mA)? [closed]

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 ...
8
votes
1answer
15k 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
3answers
5k views

Is it harmful to a laptop to put it near or above a wireless phone charger?

At the coffee shop I go to there is a wireless charging power mat made by Powermat. Is it harmful to my laptop to put it near or above the wireless phone charger?
7
votes
2answers
25k views

Laptop battery charge management [closed]

I work on a HP laptop plugged in most of the time, and after a few months the battery went off-duty. Of course, I could remove the battery each time the laptop is plugged and replace it each time I ...
6
votes
2answers
63k 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 ...
5
votes
4answers
21k 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 2....
5
votes
3answers
27k 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 ...
5
votes
2answers
23k views

Keep USB on while computer is shut down

We have recently bought a wireless mouse to replace our old one. The charging dock on our old one plugged into the mains, it also had USB to connect to the computer. Our new mouse only has a USB cable ...
5
votes
5answers
3k 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
21k 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
1answer
10k views

Is it ok to remove a laptop battery while the laptop is running on AC power? [duplicate]

Possible Duplicate: Are notebook batteries generally hot-swappable? I have a charged laptop battery in a laptop that is running on AC power and charging the battery. Would it damage the battery ...
5
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 ...
5
votes
5answers
11k 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 ...
4
votes
3answers
7k 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 ...
4
votes
2answers
7k 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 ...
4
votes
5answers
13k 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 ...
4
votes
2answers
33k 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?
4
votes
1answer
24k 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 ...
4
votes
1answer
735 views

Charging a USB-C Samsung Phone with my MacBookPro over USB-C

I just ran out of battery on my Samsung smartphone and wanted to charge it by connecting my MacBookPro to the USB-C smartphone. As a result my MacBook got charged and the smartphone worked as a ...
4
votes
2answers
1k 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 ...
4
votes
2answers
1k views

How should I manage my charging cycles to extend battery life?

I use my laptop throughout the day for various work. My usage starts sometime after breakfast and continuous into night, till about 9 pm, then breaks for dinner and continues for another hour or two. ...
4
votes
2answers
4k 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 ...
4
votes
1answer
15k 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
15k views

98% plugged in, not charging

I just purchased a new laptop Asus which has Windows 10, my concern is the battery meter showed a 100% charge in the first 6 days, and when laptop is plugged in to the mains and continuously used ( ...
3
votes
4answers
1k 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
4answers
25k 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 ...
3
votes
6answers
57k views

Laptop battery says plugged in, not charging

My laptop's battery tray icon sometimes says "plugged in, not charging". How do I make the battery start charging again? Lenovo X230, 6-cell battery, Windows 8.1 64-bit. This question says that ...
3
votes
2answers
20k 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
336 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
1answer
3k views

Why is charging mobile devices via USB so slow?

I'm developing apps so I have often a mobile device connected sometimes the battery just drains out and I'm wondering why this is happening. I was thinking about why is there no USB hub with Quick ...
3
votes
3answers
4k views

Charge laptop with mobile charger (lower voltage then required for the laptop)?

I have a Huawei Matebook X Pro which I normally charge using the original charger provided by Huawei. I'm leaving on vacation tomorrow and want to pack as light as possible, so I was wondering if I ...

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