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

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Intel Broadwell Power Consumption and Clock Speed

I'm configuring a new MacBook Pro 15″ 2015 and wanted to know if the processor speed affects the battery life (power consumption) assuming that the work load is identical? 2.5GHz Quad-core Intel Core ...
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Can a faulty battery cause my laptop to shutdown even on AC line? (battery installed AND plugged in together)

Until recently, I experience something rather annoying (and troublesome) with my laptop. It spontaneously shuts down itself without any warning, it restarts. No blue screen, no hanging program, just ...
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44 views

Is it fine to run a dc motor through USB cable connected to my laptop?

I have a dc motor which needs more than 10V to run efficiently, so instead of running it on electric cells, I usually run it using my laptop's power. I connect a USB cable to my laptop and the other ...
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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 ...
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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? ...
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How can I set a 80% battery charge limit for a HP Ultrabook? [duplicate]

I really hope you can answer this simply request. Nowadays is pretty common to have a new Ultrabook, laptop or notebook for general purposes. A very important feature is to have a healthy battery. ...
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2answers
15k views

Laptop battery charge management software [closed]

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 ...
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2answers
7k views

Enable Lenovo's “conservation mode” on boot

I have a Lenovo Z50 laptop with Lenovo's Energy Manager installed. Inside the manager's settings menu is an option to enable "conservation mode", which keeps the battery charged in the 40-65% range ...
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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?
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1answer
107 views

Alternative to Lenovo “Conservation Mode”

I have a Lenovo Y50-70, which I am doing a clean install of Win8.1 on (A new SSD) The Battery software that comes with it out of the box contains a very useful battery conservation mode. This stops ...
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1answer
445 views

Extremely Wrong Battery Life

I am running Windows 8.1 on my Dell Inspiron 15", and when I click on the battery icon, it shows an outrageous battery life, which makes no sense: like 58 hours and 44 minutes (42% remaining). How ...
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83 views

Run time difference between a 4-cell (43 Wh) battery and an 8-cell (58 Wh) battery?

Is there a significant improvement in battery run time going from a 4-cell (43 Wh) battery to an 8-cell (58 Wh) battery? How much longer will it run (percentage-wise)?
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How do I disable devices to conserve power?

I run ArchLinux on a Lenovo G series and downloaded powertop and it says that USB bluetooth and "USB device: Lenovo EasyCamera" are drawing a lot of power. While it advised I implement these rule: ...
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2answers
70 views

Brand new laptop, two years in storage, will the battery be ok?

I have an opportunity to buy a brand new (sealed box) EliteBook 8470p laptop for a good price. The date of manufacture goes back to around March 2013, which is bang on two years ago. Given that it's ...
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8answers
954 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 ...
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1answer
48 views

How does windows calculate time left for a battery?

I assume the relatively new versions of windows calculate the battery remaining the same. If not, to avoid broadness, show the calculation for windows 8/8.1.
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1answer
680 views

What is the “known hardware incompatibility” that disables PCIe Active State Power Management? How do I fix it?

I'm on Windows 7. I just ran a Power Efficiency Diagnostics Report through powercfg -energy and I got this error: Platform Power Management Capabilities:PCI Express Active-State Power Management ...
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1answer
324 views

Does “use hardware acceleration when available” feature in google chrome consume more battery?

I want to know when i enable "use hardware acceleration when available" feature in google chrome, it consume more battery? what is the advantage of this feature? is it better to enable or disable this ...
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1answer
112 views

Connected Standby eats battery when wlan is down

I use a surface pro 3 and connected standby usually works like it should: I close the cover, the surface enters standby mode, when.I open it hours later it's immediately ready and barely lost battery ...
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4answers
6k 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 ...
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2answers
61 views

For better battery backup whether we have to start charge the laptop when battery about to drain? [duplicate]

I recently purchased a laptop ,I have get suggestions from so many people that we should start charging laptop when battery is about to drain and the reason I am getting is battery will last for ...
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2answers
92 views

How to measure how long it take's for a laptop's battery to charge

I have the following scenario: I am testing several laptops with Windows 8.1 installed. One of the tests is to measure how much the battery lasts. For this task I use benchmarks like PeaceKeeper or ...
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1answer
178 views

My laptop battery discharged in sleep mode?

My laptop computer is an Acer Aspire M5-583P-6428 touch screen laptop computer. Its specs are as follows: Intel i5-4200u Quad-Core Processor Intel HD 4400 Integrated Graphics 500GB hard ...
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3answers
417 views

Why does reducing CPU frequency improve battery life?

Shouldn't we have roughly the same battery life regardless of the frequency since the higher the frequency is, the faster tasks will complete so in the end the CPU, despite running at a higher ...
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1answer
353 views

How do I turn off MagSafe light?

When I go to sleep at night, the two green lights (emitting from both sides of the MagSafe connector of my 13" MacBook Air's power adaptor) light up my whole room. How do I turn these off? I ...
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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 ...
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230 views

Force-reset laptop battery statistics

On my Acer Aspire S3 laptop-of-almost-3-years BatteryInfoView says that the battery's capacity is at roughly 35%. So, whereas once it would hold for 4,5 hours, now it's down to 1:45 at best. However, ...
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2k views

How to get rid of “Consider replacing your battery” warning in Windows 7 power settings

When I turned on my laptop (Acer Aspire S3-951) today, I saw the following message under the power icon. I know that my battery is 61% degraded, but how do I get rid of the extra text that says my ...
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4answers
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Wireless Keyboard/Mouse: Should batteries be removed when not in use?

I recently bought a Logitech Wireless Keyboard and mouse. I use it almost daily but for a couple of hours only. The keyboard has 2 AAA batteries and the mouse has 1 AA battery. The box mentions that ...
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1answer
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Buying the correct battery

Looking at getting a new battery for an HP elitebook 2560p. However, there are many 9cell batteries running different mAh from 6600mAh to 9000mAh. Is there a big enough benefit in buying a 9000mAh ...
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3answers
27k 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 ...
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Am I ruining my laptop battery? [duplicate]

I have a brand new Asus ux303ln. The laptop is fine but I use it mostly for work. That is: le laptop is continuosly plugged in, on charge. I am worried whether this can reduce the life of my battery ...
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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 ...
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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 ...
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Laptop suddenly off without notice the battery level

My laptop is HP Probook 4540s and running on Widows 7 32bit OS. My battery may be week now. But the problem is Laptop suddenly off without notice the battery level. Not shutting down or hibernateing. ...
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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. ...
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Application to only partially charge laptop battery [closed]

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 ...
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7answers
7k 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 ...
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9answers
52k 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?
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How should i use my new lenovo laptop(power supply)

I usually keep it at home. Is it alright to use it plugged in? I don't want to mess up the battery. I love how smooth the laptop runs plugged in and i dont want to strain the battery by changing ...
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2answers
466 views

Why is there such disparity in battery life between wireless mice?

When comparing the specifications of wireless mice, the battery life figures I encounter (as reported by both manufacturers and users) can be wildly different, even between similar mice. For example: ...
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0answers
37 views

Is there a way to estimate the current life of my ancient phones battery? [closed]

I have a 3 year old S2 and I wonder if there is a way to estimate how much weaker than new the battery is right now? Something like a percentage (50% of new) or effective capacity(1000 mAh). Is this ...
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0answers
120 views

Samsung Ultrabook Series 5 Cuts out with 50% + battery life left

Initially with 100% battery charge, laptop shows time remaining of around 8 hours. Then with an hour it drops constantly before shutting down without warning when the battery showing around 60% ...
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2answers
70 views

Will stopping a charge cause a decreased life span of the battery

Occasionally, I need to stop battery charging, for example at 50% due to emergencies. Will stopping a charge cause a decreased life span of the battery? Also, will leaving battery plugged in when ...
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What depth of discharge does 0% in a UPS correspond to?

When a UPS like an APC Smart-UPS shows 0% charge remaining, does it mean the deep-cycle batteries are completely discharged or that they're at 20%?
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1answer
167 views

Prevent hardware from loading or consuming (battery) power?

I'm using an Asus Zenbook UX32VD notebook and would like to maximize its battery life. Would it be useful for me to disable devices that I do not use, such as the internal bluetooth device? Also, ...
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1answer
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Power4gear purpose and value

Asus laptops have Power4Gear app installed. Beside usual "custom" settings like when screen dims, laptops goes to sleep etc, does it have any other purpose or value? For example, does this software ...
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1answer
339 views

Is it worth replacing a laptop battery? [closed]

I have a Toshiba Satellite U300 from around 2007. It works fine but the battery is dead so I have to plug it in everywhere. I can get a replacement battery for around $100. What sort of battery life ...
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3answers
70 views

laptop battery usage with AC supply

Does the laptop battery get affected by A.C. supply? Does the life of the battery gets affected if run our laptop continuously on A.C. power? All the laptops run on A.C. power when getting fully ...
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3answers
8k views

Lenovo laptop: Is it ok to leave the battery charging while it is being used? [duplicate]

Is it ok to leave the battery charging while it is being use? Or is it ok to keep the power plugged in with full charged battery while the laptop is in use? Can this shorten battery's lifespan?