Batteries are the embedded power-source of a component such as a notebook. It is composed of cells of chemical elements that store energy.

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113
votes
9answers
42k views

Is it better to use a laptop on battery or on AC power?

When I'm at home, is it better to use the laptop plugged into AC power, or with just the battery, for the overall battery life?
18
votes
8answers
833 views

What are some good practices for making sure my laptop battery serves its full life?

Basically, I'm looking for some do's and don'ts. Is it bad to keep my laptop plugged in when I'm not using it (majority of the time)? Is it bad to plug it in once I've finished using it (with it ...
13
votes
3answers
2k views

Are notebook batteries generally hot-swappable?

I have a new HP Compaq 610. Most of the time I use it plugged and with the battery removed, to avoid wearing it. Sometimes I need to move it to somewhere else - currently I hibernate the machine, move ...
5
votes
4answers
4k views

Battery charge suddenly drops from about 25% to 6%

I own a Lenovo Y500 series laptop. The battery being an year old lasts only 1 hour. But the strange thing is that, when the charge comes down to 25-20 it drops to 6%(critical battery level) in 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 ...
5
votes
8answers
40k views

Is it safe to operate a laptop without battery?

I know it's 'unsafe' in terms of data loss but I noticed motherboards still have some of their circuits on power when they are plugged in [e.g. a circuit that must wait for power-on signals is ...
11
votes
3answers
12k views

Is it OK for the laptop to always be plugged in? [duplicate]

Possible Duplicate: Is it better to use laptop on battery or on AC power? If I stay near a power source is it recommended to always have my laptop plugged in? Or should I use the battery ...
9
votes
2answers
10k 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 ...
18
votes
8answers
766 views

Is a UPS a good investment for a home machine?

Is it worth the money to invest in a battery-backed UPS unit for a home machine? Or is it a waste of money? The purpose of the UPS would be to prevent a "meltdown" of the computer due to bad power ...
6
votes
4answers
2k views

Control charging and discharging of laptop battery

Just heard that if Li-ion battery is kept at 40~60% charged, its lifetime will be longer. Is this correct? If so, are there some applications, respectively for Windows XP, Windows 7 and Ubuntu, that ...
4
votes
1answer
501 views

Storing a laptop for a month

I won't be using my laptop for a month. I remember I let a laptop sit all summer and the battery failed. How do I store a laptop and battery properly?
2
votes
3answers
15k views

Laptop battery: is voltage really important to respect?

I got an Acer Aspire 5100 and I just bought a new battery (after the stock battery just died yesterday). But I saw something after buying and I'm wondering whether it's really important or not. My ...
2
votes
3answers
316 views

Increasing Laptop Battery Service Life [duplicate]

Possible Duplicate: What are some good practices for making sure my laptop battery serves its full life? I use my laptop as a replacement for desktop. I generally use it for 6 to 7 hours a ...
2
votes
1answer
1k views

Battery icon missing from task bar

I used to have an icon on the Windows Vista taskbar showing the battery amount remaining (laptop). It has mysteriously vanished. How can I get it back? I followed the Windows FAQ (see How can I hide ...
0
votes
3answers
5k views

Laptop Battery does not show true charging level

My laptop has a 6 cell Lithium Ion Battery. Even when the battery is fully charged it shows the battery charge status at 0%. As a result if there is a power loss (when I want to move the laptop from ...
15
votes
4answers
5k views

Can I run a computer using DC power?

I always thought that using a conventional UPS with a PC is highly inefficient. Power goes from AC -> DC -> AC in UPS and then AC -> DC in PC SMPS. Since PC works only with DC (12, 5 and 3 volts) It ...
6
votes
3answers
24k views

Laptop Battery Diagnostics Software? [closed]

My Compaq CQ50-215CA laptop with Windows 7 Ultimate RC 32-bit recently told me to replace my battery for fear of sudden shutdowns. Is there any good diagnostics software that anyone has used to test ...
4
votes
1answer
152 views

Windows application that debug battery consumption

Does someone knows an application for Windows that debugs battery consumption? Im looking for some software that could estimate the remainder batteries energy under some specific conditions. I would ...
9
votes
6answers
11k views

What is the impact of leaving a laptop in “sleep” mode (while on battery power)? [closed]

How much battery would leaving my laptop at "sleep" mode consume? is the consumption low enough so that it would be safe to leave the laptop sleeping at nights regularily and using it tommorow? ...
4
votes
2answers
3k views

Is a laptop damaged by always keeping it plugged in?

If I keep the power cord plugged in all of the time, will it damage my laptop?
4
votes
2answers
3k views

Is there a way to execute a program on power events?

I'm basically looking for a way to execute an application when my laptop transitions to battery power and, similarly, when it returns to AC. Is there a built-in hook in Windows or a third-party ...
3
votes
2answers
9k 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
4answers
7k views

Removing Battery and running the laptop in pluged in mode?

Is it fine, if I remove the battery from my system and run in by having it pluged-in by the charger? Will it cause any damage to the system? My Laptop is an HP Probook 4320s (which comes under the ...
2
votes
3answers
1k views

Laptop becomes very slow when hot

Everytime I run my laptop for a while, my laptop becomes very hot and it responds very slowly, even with only one program active. Is it a hardward problem? if so, which one should I replace to fix the ...
2
votes
2answers
1k views

Windows battery meter utility suggestions

Can you suggest a good battery meter utility for Windows? Battery status being graphically displayed in the taskbar is the (obvious) minimum requirement. Anything else the utility can inform or do is ...
1
vote
1answer
908 views

How can I always display the remaining battery time on the Windows 7 taskbar?

I want to have the remaining time always visible, and not to have to click/hover to see it. Is it possible only with some gadget? If so, which one would you recommend?
0
votes
2answers
1k views

Laptop battery holds charge, but won't charge any more

Ok, I'm sure I will need to replace either my battery or my AC adapter, but would rather not buy one if the other is the problem. My problem is. I have a Sager laptop that gets quite a bit of use. ...
5
votes
2answers
7k views

is a CMOS battery rechargable?

if so, how does it's recharger look like?
3
votes
5answers
1k views

What does it mean if your Windows laptop shows “Consider Changing Your Battery”?

I am currently getting a a message saying "consider changing laptop battery" when my battery gets to 10%. I also have a red X over the battery Icon all the time. I think my battery is ok though. ...
2
votes
1answer
496 views

Windows 7 low and critical battery levels cannot be set lower than 10%

How do I change the low and critical battery levels to below 10%? I understand that this is a reasonable limit for most portable computers, but what about those with large batteries? On my computer ...
1
vote
4answers
1k views

AC/battery laptop issues(not a simple charging fix)

Is it possible to run a laptop off the battery while the AC is plugged in? I can play games no problem while just the battery is plugged in, but obviously that means I have to let it charge after ...
0
votes
1answer
159 views

Laptop getting shutdown / run by battery after 10 minutes

Laptop is getting shut down after 10 minutes while it's run without battery - but with battery as well as plugged in it runs first 10 minutes by power then automatically runs by battery until the ...
0
votes
0answers
24 views

Laptop shuts down when battery meter is relatively full. When I plug in and reboot, battery meter correctly says 1% and charging [duplicate]

Possible Duplicate: Laptop Battery does not show true charging level Subj.: Laptop shuts down when battery meter is relatively full. When I plug in and reboot, battery meter correctly says ...
0
votes
3answers
204 views

Laptop battery replacement possible?

I have the standard Acer Aspire one 532h-2Db, I am looking to upgrade the battery from a standard 6-cell to a 12-cell ( for more longer terms away from the mains ) and I've hit a problem, I cannot ...
0
votes
3answers
296 views

When to use laptop battery? [duplicate]

Possible Duplicate: Is it better to use laptop on battery or on AC power? When laptop battery is fully charged, what is the best for battery life : use the battery or to use AC adapter (in ...
0
votes
1answer
5k 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 ...
32
votes
8answers
5k views

How can a CMOS battery store data?

How does a CMOS battery store information on it? I know it stores information such as the time, date, passwords and drive configuration, but how? How can a battery store data?
12
votes
2answers
4k views

How long do Lithium Ion batteries normally last?

On the laptop I have, I've had to buy a new Li-Ion batter roughly every year. I do use this computer quite a lot, but I'm wondering if this is normal. Right now, my battery is completely dead (it ...
8
votes
3answers
793 views

How to rebuild a Li Ion laptop battery?

I have an aging Gateway NX560XL laptop. The battery is toast and a new one, even aftermarket, starts at $130. So, to experiment, I began tearing apart the old battery to see what can be done. I ...
1
vote
2answers
17k views

Macbook Pro won't boot after battery is depleted

I have an early 2008 Macbook Pro (not sure on the exact model as I do not have it with me) which is having some interesting (annoying) power issues. When the laptop runs flat and the machine turns ...
13
votes
1answer
1k views

Is it safe to store a battery in the freezer?

Of course, assuming you wrap it in a tight plastic bag to avoid humidity. I have a laptop battery at my office that's not currently in use, and also won't be used at least for the next several ...
7
votes
6answers
3k views

MacBook Pro: Should I put my battery out?

I'm quite new to Mac and OSX. I have my MacBook Pro now for about 4 month and I know there are a lot of battery-related questions around. I just noticed that after 4 month I have the following battery ...
4
votes
3answers
1k views

System connected to UPS goes to sleep short time after power is lost

I have a Win7 x64 system connected to the UPS. The UPS is capable of maintaining the system power for about 30 minutes. After I have connected the UPS, I have verified this by disconnecting the power ...
4
votes
2answers
4k views

Is it safe to replace a 4400mAh laptop battery with a 8800mAh battery?

I have an Acer Aspire 5536G. My battery is having problems so I am thinking of replacing it. I have searched online through many sites and I found some good deals. However, currently my laptop has a ...
4
votes
1answer
3k views

Windows XP/Vista/7 Check Battery Charge from CMD?

Does anyone know how to get the battery status in windows? On Linux it is as simple as acpi -b but in Windows this simple task seems impossible. powercfg -energy can get all kinds of all information, ...
4
votes
2answers
13k views

What's the best UPS unit for a home PC [closed]

I recently moved into a new house, and it seems that every time there's an electrical storm, the power will blink on and off quite frequently. I was thinking of getting a UPS (Uninterruptible power ...
3
votes
2answers
1k 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 ...
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 ...
6
votes
1answer
6k views

Thinkpad T60 does not turn on

When I plug in the charge, the battery symbol and the charge symbol will light up green. Then, when I try to press the power button, the lights turn off and nothing happens. After this, the only ...
6
votes
5answers
13k views

Can you plug-in the battery while laptop is on AC only?

I'm using my laptop at home with battery removed and only connected to the AC power. However I'm lacking the mobility as my power cord is kinda short. Is it safe from electrical point of view to plug ...