Battery life refers to the amount of time that a portable computer such as a laptop can function while powered only by its battery.

learn more… | top users | synonyms

156
votes
6answers
66k 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 ...
115
votes
10answers
43k 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?
48
votes
6answers
14k views

What is it that kills laptop batteries?

There are many superstitions on what you must never do lest your battery become worthless - and by worthless I mean hold about 16 - 24 seconds of charge. This has happened to every laptop I have ever ...
26
votes
4answers
2k views

Battery Life Practice

What should i do with my battery to have it live the longest? I was told the few first timing it i should let it completely drain then charge it. Should i leave it completely drain for a few days? ...
18
votes
8answers
844 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
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 ...
13
votes
3answers
4k 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 ...
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? ...
8
votes
4answers
3k 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. ...
8
votes
3answers
285 views

How to get the most out of laptop battery life of a Windows PC?

I'm a big fan of portability and battery life. I want to take the most out of a single recharge. Any tips to accomplish that? Things on top of my mind: Voltage reduction (with RMClock, any better ...
7
votes
3answers
4k 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 ...
7
votes
1answer
8k views

Does the samsung “battery life extender” work?

I have bought a Samsung series 9 15inch (NP900X4C), and there is an option called battery life extender : Sets the maximum battery charge level to 80% to extend the battery lifetime. Samsung ...
7
votes
6answers
1k views

Turn off monitor on del Vostro 1500 while laptop in use?

Since I'm blind and use screen reading software I don't need to use my laptop's monitor and it's nothing but a battery drain. Is there a way to turn off the monitor on a del Vostro 1500 laptop while ...
6
votes
4answers
3k 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?
6
votes
2answers
3k views

Does it save battery to have your desktop background set on a dark color?

Do you think that a laptop consume less power when the color displayed on the screen is darker ? (And even less when the color is totally black) ? I don't mean reducing the brightness or contrast ...
6
votes
7answers
5k views

Can I reduce the CPU speed of my MacBook when on battery?

I've got a MacBook with a Core 2 Duo CPU. I've got CoreDuoTemp installed which can show the current speed of the CPU. It appears to always show: Mini : 1.0 GHz Maxi : 2.0 GHz Current : 2.0 GHz I ...
6
votes
1answer
14k views

why the first time charge is important

It is always advised to charge a device lithium battery (pretty much all laptop, camera, phones have it) long in the first time to extend the battery life. Could anyone explain why it is so?
5
votes
5answers
6k views

Logitech M705 Wireless Mouse: Are the batteries dying, or does the device have a hardware failure?

I have a Logitech M705 wireless mouse. I'm first time using a wireless mouse, so I don't have much experience with the hardware features and behavior. It is rated that it runs for 3 years with the ...
5
votes
3answers
6k 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 ...
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 ...
5
votes
1answer
817 views

Preparing to use new laptop battery

I have received a new laptop battery as my old one became useless. In the instructions provided by the shop I got the battery from (not from the instructions provided by the battery manufacturers), ...
5
votes
4answers
3k views

Poor battery life Windows 8

I have an Acer laptop (AS4820TG, it's about 2 years old), and I recently installed Windows 8 to a partition I made on my SSD (now I'm dual booting 7 and 8). My laptop's always had pretty good battery ...
5
votes
1answer
786 views

Any tips to extend battery life under 'Bootcamped' Win 7

I have a late 2008 MacBook and have recently installed Windows 7 via Bootcamp. Under OSX I can get about 4 hours of web browsing and general usage but under 7 that is slashed to about 2 hours. I ...
5
votes
3answers
22k views

Re-Calibrate Toshiba battery meter with Windows 7

I have a Toshiba U300 laptop. Back in the olden days (circa-2000) you could re-calibrate the battery meter from the BIOS when your battery was no longer reading accurately. My battery was shot, so I ...
4
votes
2answers
2k views

Why is keeping my Mac battery 40%-80% charged advantageous?

This article from Lifehacker notes that keeping my Mac battery 40%-80% charged is advantageous. ...
4
votes
2answers
332 views

Do live tiles continue to update when I'm not looking at the start screen?

If I glance at my start screen, do I need to wait a few seconds for the tiles to show up-to-date information? Or do they continue to update when I'm not looking at the start screen?
4
votes
2answers
2k views

How much does having Aero on affect battery life?

Just started using Windows 7. Aero makes thing look pretty but it doesn't have any pragmatic purpose does it? I was wondering though, I haven't noticed a performance effect, but does Aero have a ...
4
votes
2answers
321 views

Dell M6700 much slower when connected to external battery pack (Energizer XP18000)

A while back, I bought some external battery packs to extend the battery life of my laptop. They're Energizer XP18000s. But I got the feeling that my laptop was going much slower with the battery ...
4
votes
2answers
240 views

Performance for Intel's new Low-Voltage CPUs

I've been laptop shopping recently, and I'm intrigued by the Acer Timeline series. It seems to fit somewhere in between "netbook" and "power laptop" performance-wise, and is rated at 8 hours battery ...
4
votes
1answer
3k views

Calibrating a battery

I have a laptop and I would like to know how to calibrate my battery.
4
votes
2answers
531 views

Does depleting the battery completely do damage to it?

This question applies to laptops, but also to smartphones or anything that's battery based and rechargeable. Does depleting it completely (Computer won't even turn on, or turn on but shuts down ...
4
votes
2answers
5k views

i7-3537U or i5-3337U - How much does it affect battery life [closed]

I want to purchase a laptop, will be using it mostly for general study work, word, excel, web surfing, movies etc. I finally came down with two dell laptops, only difference with the processor, one ...
4
votes
1answer
923 views

Should I overcharge mobile phone before first using? [closed]

When I first buy a mobile phone or phone battery I used to know i should charge it about 8-10 hrs switched off the phone. But i don't know if its actually necessary to overcharge a battery for its ...
4
votes
3answers
4k views

Battery life with i3 vs. i5 vs. i7

I recently purchased a laptop with an i7-640m processor (blinded by a discount), and my battery life is fairly horrendous: the manufacturer given battery life is 6 hours (I know, it's an upper bound), ...
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
6answers
4k views

Very poor battery life on Lenovo ThinkPad W500 laptop

I have a new ThinkPad W500 laptop (w/ 9 cell battery) running Windows 7 RTM 64-bit. All drivers* and BIOS are the latest. Battery life appeared poor so I performed several tests under the following ...
3
votes
4answers
4k views

How can I identify which application is responsible for my battery life being short?

My laptop is getting much shorter battery life than advertised, and obviously that's going to be due to some code running that's draining it faster than is optimal. How can I (using Mac OSX 10.6) ...
3
votes
3answers
6k views

Software to show battery life of laptop? [duplicate]

Possible Duplicates: Find time to charge in windows 7 How can I always display the remaining battery time on the Windows 7 taskbar? What is a small, free piece of software I can use to ...
3
votes
7answers
16k views

Why is my battery life running out so fast in my laptop?

I have a Fujitsu Siemens v5535 Esprimo Mobile. The battery drains fast even though I just bought a new one. What could this be attributed to?
3
votes
5answers
2k views

Is it normal for a laptop to discharge to 60% when not plugged in and not turned on for 5 days?

I recently purchased a Lenovo IdeaPad Y400 and have noticed that after I do the following: Use the laptop while plugged in Shut down and unplug (it is fully charged at this point) Turn it back on ...
3
votes
2answers
790 views

Battery management of a Macbook

I bought a Macbook Pro last week. I mostly use (and plan to use) it like a desktop with an external monitor. I use the system at least 15 hours a day. Now using the coconut battery application, I ...
3
votes
1answer
329 views

Does dirty power shorten the life of a laptop battery?

I have a two year old laptop that has spent most of it's life in a third world country where the power is very dirty*. Does the dirty power shorten the life of the battery or will it have no effect? ...
3
votes
3answers
589 views

How do laptop battery voltages affect runtime?

I ordered a new battery for my faithful XPS M1710. I'm not sure of the voltage of the battery I have now, but the new one that the Dell rep got me (after 3-4 times confirming my phone number and ...
3
votes
1answer
4k views

Which Linux distribution is best out of the box for battery life on netbooks?

I've been using Ubuntu for the past four years, but I recently bought a Dell Mini 1012, and while Ubuntu 10.04 is wonderful in every way, it is giving me quite poor results in terms of battery life, ...
3
votes
3answers
2k views

How can I limit battery charging on a Surface Pro (2) or Windows 8(.1)?

Limiting the maximum amount that a battery can be charged extends its life. Historically, utilities for this have been provided by the manufacturer (i.e. on Sony and Lenovo). Does Windows 8 or 8.1 ...
3
votes
2answers
1k views

On a laptop which consumes more power - cordless mouse or wired mouse?

Which consumes least power from the laptop battery out of the following - a corded USB mouse or a cordless mouse with USB transceiver or bluetooth wireless mouse? I have a laptop running Windows 7 ...
3
votes
1answer
1k views

Does freezing a Li-ion battery have any effect on its ability to hold charge?

Ok. I've heard this rumor at least 100 times. I can't find any information to substantiate it or any serious research done it. Is it a total rumor, or is there truth to it? Has there ever seen a study ...
3
votes
1answer
4k views

Application to only partially charge laptop battery [on hold]

I was wondering if there were any software packages out there that will prevent my laptop battery from charging above a specified level. I know there are propriety options out there for Samsung and ...
3
votes
1answer
99 views

How is battery charge reported to the operating system?

This feels like a stack exchange EE question, but it seems like it belongs here instead. How is the charge of a notebook computer's battery reported to the operating system? Since all laptop ...
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 ...