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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140
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7answers
63k 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?
85
votes
5answers
18k views

Why are my games slower on battery power, even with the power plan set to High Performance?

My laptop is capable of running most games on high settings at decent frame rates. However, if the power cable gets unplugged while I'm playing, the game immediately starts slowing down, even if I'm ...
61
votes
4answers
9k 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.
34
votes
8answers
9k 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?
27
votes
2answers
1k views

How does Windows detect battery issues?

I have a laptop that's a little over 5 years old, and I've never changed the battery, so I believe Windows 7 when it tells me "there is a problem with your battery", and to consider replacing it. My ...
25
votes
3answers
10k views

Why do PCs still require a CMOS battery?

Why do PCs still require a CMOS battery, given that they're already plugged in? We are providing lots of power to the PC by plugging it into AC mains electricity, so why does it still require a CMOS ...
23
votes
8answers
1k 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 ...
20
votes
5answers
990 views

How to safely store a defective (bulging) lithium-ion battery

I have a defective lithium-ion battery, one that is bulging quite severely, it's about 50% thicker in the middle than at the edge. While the battery actually still works, I've replaced it as the old ...
20
votes
6answers
10k views

Does more RAM usage cause more battery usage?

I'm using a 2 year old 15" AMD laptop running Windows 8, and its battery life is not as long as the brand new ultrabooks for sure. In the place I'm currently working I don't have access to a power ...
20
votes
2answers
43k 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 ...
20
votes
4answers
10k views

Can a new battery go bad if unused

My old 2008 macbook's power adapter died recently and since I was not sure if the problem was it or the battery, I ordered a new generic battery as well just to speed things up. After I received my ...
19
votes
8answers
843 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 ...
18
votes
4answers
8k 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 ...
18
votes
3answers
15k views

Software to hold battery at 50% charge level

My Sony Vaio laptop has a built-in program called "Sony Battery Care" which provides a functionality to hold battery at certain levels of charge while operating. For example, I've set it to 50% and ...
16
votes
4answers
4k views

Do recommended battery charging practices for a laptop apply to an ultrabook (with non-removable battery)?

For normal laptops, everyone said that if you want to use your laptop for a long period of time at home, its better if you detach the battery and just connect it directly to power. I followed this ...
16
votes
3answers
4k 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 ...
15
votes
2answers
8k 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 ...
15
votes
2answers
12k views

Can I run my MacBook in clamshell mode without being connected to power?

At home, I run my MacBook in clamshell mode (closed lid, external display). This works fine when you're connected to the power adapter, but it doesn't work when running on battery. That's how it's ...
14
votes
4answers
7k views

Laptop Battery Technology

My laptop battery has finally taken the plunge and I'm looking online for a new one. However I'm getting lost in all of the specs of the batteries that are out there. I'm looking to gain a better ...
14
votes
1answer
3k 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 ...
13
votes
8answers
7k 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 ...
13
votes
3answers
15k 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 and ...
12
votes
3answers
2k views

Laptop Either Shows 100% or 0% Charge

I have a strange issue with my Compaq CQ 61 running Windows 2012 (server) and I have Googled for it really long and hard and also searched other questions here but in vain. I believe my problem is a ...
12
votes
2answers
20k views

Is a CMOS battery rechargeable?

Is a CMOS battery rechargeable? If so, what does its charger look like?
12
votes
2answers
1k views

My MacBook is a Battery Denier

I have a four year old MacBook rev 1,1 (the original Intel Core Duo). Just recently it has begun denying the existence of its battery while still happily running unplugged. I get the X battery icon ...
11
votes
3answers
13k views

Using a higher current charger on a laptop which requires a lower current [duplicate]

Possible Duplicates: Laptop power supplies, does current matter? Can I use a power adapter with more current but lower voltage on another laptop? I have an ASUS K50IN laptop which requires ...
11
votes
6answers
8k views

Why Ubuntu eats more power than Windows?

I play full screen video with maximum volume or browse the Web with WiFi. Under Windows 7 my laptop works ~5 hours. Under Kubuntu 10.10 only ~2 hours. I've got Acer Aspire 1810TZ. Battery wear ...
11
votes
3answers
1k views

Notebook's Battery is not calibrated. Operates at 0% for an hour

My problem is that even if the battery percentage is 0 the notebook can stay on around an hour. I have disabled "critical battery action" on my operating systems to use more time my notebook. The ...
10
votes
3answers
13k views

How does limiting a laptop battery's full charge to less than 100% extend its battery life?

My laptop lets me limit how much of the battery will charge before reaching full charge: At first, I understand what the intent is. I know that overcharging a battery will result in degradation of ...
10
votes
3answers
10k views

Should I remove my laptop battery? [duplicate]

Possible Duplicate: Is it better to use laptop on battery or on AC power? I keep my Thinkpad T60 laptop plugged in all the time. Should I remove my battery or if not, should I drain it ...
10
votes
6answers
16k 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? What'...
10
votes
2answers
2k views

What happens when laptops reach 100% charge?

I have been reading alot of mixed views on how Lithium Ion batteries work when it comes to laptops. I have the new dell xps 15, with an intel i7 cpu, 16gb ram, and a 512gb ssd. Is it bad for the ...
9
votes
5answers
13k views

Fastest way to drain battery

I'm using Mac OS X 10.7.1 on a Macbook Core 2 Duo. What's the fastest way of draining the battery without crashing the system and preferable by using some sort of a script?
9
votes
3answers
1k 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 ...
9
votes
4answers
4k views

Is it a bad idea to keep a Macbook pro always on? [duplicate]

Possible Duplicate: Is it better to use laptop on battery or on AC power? I never turn off a macbook pro I've at home. It's always connected with the power source, but with the lid closed. Is ...
9
votes
3answers
12k 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 ...
9
votes
5answers
23k 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 ...
9
votes
2answers
512 views

Buying a laptop battery - OEM vs. 3rd party

Looking at a replacement 9-cell battery for my Dell 1525 I've noticed that the OEM batteries that Dell sells are up to 3x more expensive than batteries sold by a 3rd party vendor. Is the Dell premium ...
9
votes
3answers
4k views

Reviving a dead laptop battery

Is there any way to revive a dead laptop battery? I have a three year old Dell Latitude laptop that I've been using pretty intensively. After a year or so, the battery dropped dead - if I plug the ...
8
votes
3answers
2k views

What is an easy way to drain a laptop battery to 0?

I need a way to kill my battery in my Ubuntu laptop. Is there any mind numbing tasks I can Ubuntu do that will eat up the battery? I have already shut off the power management options. The battery is ...
8
votes
2answers
5k views

Is it a good Idea to switch to a SSD to use less battery?

I am thinking of buying a SSD for my laptop, mainly for the purpose of extended operating time when running on battery. At the moment I use a Hitachi HTS545032B9A300 (320GB) (Datasheet) as main drive ...
8
votes
5answers
27k views

How long does CMOS battery (3V) on a motherboard last?

Just wondering usually how long does CMOS battery last on a regular motherboard? I read that motherboard leakage current of about 3 - 6 micro ampere. I did a calculation below but I believe that i ...
7
votes
6answers
17k views

Easy way to switch power plan in Windows 10

I've a 27" external monitor connected to my laptop and I use my laptop's screen as secondary. I've both screens turned on while I'm working. When I'm watching movies, I just keep my external monitor ...
7
votes
4answers
8k views

Should I use UPS with my laptop to extend the battery life?

I recently bought a new Vaio laptop which has a 4400 mAh battery. I will use it at home most of the time, and I have an unused uninterruptible power supply (UPS). Should I remove the battery and ...
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 ...
7
votes
1answer
10k 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, ...
7
votes
4answers
6k views

How to display battery discharge rate in watts, Windows 8 + perfmon

Windows 'perfmon' utility allows to display graphs for different counters. One of them is Battery -> "Discharge rate" that can be spotted in the internet as a good way to examine battery discharge. I ...
7
votes
2answers
10k views

Can a faulty battery cause a laptop to crash?

After replacing a blown out motherboard, my Toshiba Satellite C600 is still malfunctioning lately: BSODs. Distorted graphics, and freezes. Sudden shutdowns. After removing the battery and doing a ...
7
votes
8answers
20k views

Can using higher rated battery damage device?

I am in need of a battery for my Lenovo 3000 Y410 Laptop. It's installed battery has voltage rating of 10.8v. But the shop i've consulted has only a battery of 11.1v rating. Should I buy the ...
7
votes
3answers
209 views

Is there a way to automatically disconnect a notebook from the eletrical power-supply?

I know this looks like weird and useless, but let me explain... I'm running Windows Assessment and Deployment Kit (Windows ADK) to make some tests on Windows 8 Preview. One of it's assessment is the "...