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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2answers
15 views

Laptop battery uptime monitor

Is there any way to measure what sort of uptime/active usage I get out of a given battery charge; that is, how long do I get actually using the laptop between full charges. I'd like it to be a ...
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0answers
13 views

Android Nexus 7 app battery usage percentages add up to over 100% of battery consumed

Simply put, the menu says that I've use 72% of my battery for screen and 42% for Wifi, among other things. This doesn't even include OS, which is at 48%. What is happening?? I'm running 5.1.1
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0answers
47 views

How phone charging algorithm works? [on hold]

Just wondering, how is this possible that software in smartphone controls whether allow or disallow power from charger (mostly iPhones with their "uncertified cable" nonsense)? The power is flowing ...
0
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1answer
5 views

How can I add power plans to the battery notification area in Windows 10?

In previous versions of Windows it was possible to choose a power plan by left-clicking the battery icon and selecting the relevant power plan. As far as i can tell in Windows 10, this is not ...
1
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1answer
25 views

Strange battery behavior (not discharging)

Lately my laptop got this problem. Right after i unplug it (with full charge battery) it says that the duration remaining is about 30 minutes. Then, after few seconds, it drops from 100% to 90/96% ...
0
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0answers
24 views

How should I go about replacing my Acer Aspire 5742G-6426 laptop battery? Don't know where to start [closed]

My laptop battery is on its way out after almost four years of use. My battery has a small red 'x' symbol on the bottom of the icon, and hovering over it suggests "consider replacing your battery". ...
0
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1answer
39 views

Power mode change randomly on Windows 10

My question : Sometimes, randomly, whether i'm on battery or not , the power mode always switch to performance mode even if i'm on saving battery mode. Plus, on this moment, the start menu pops out, ...
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0answers
45 views

Laptop plugged in but not charging

Note this may look like a duplicate of previous questions but it's not. This question is why has this problem started occurring, i.e. what has changed either in Windows or laptop hardware to cause ...
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1answer
20 views

Trying to understand the difference between various batteries for Lenovo Thinkpad T520

There are various types of batteries for the laptop and I'm not sure which one is best. The one I have right now (which came with it), is not enough to last me through my back-to-back classes, so I am ...
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4answers
227 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 ...
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0answers
27 views

Fujitsu lifebook s752 BIOS password removal

I am trying to remove the BIOS password on a Fujitsu lifebook s752. Trying to remove it by getting a master password and using dogberts algorythms is impossible as it gives me back a 24 digit hash, ...
0
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1answer
16 views

Should I replace the AC charger as well when buying a new battery? [closed]

My notebook is already 4 years old, and it's battery basically died from one day to another (one day it could support the notebook for an hour, the next day I could get at most 2-3 minutes out of it). ...
0
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1answer
42 views

Laptop Charger Short Damage

today while I was plugging in my laptop charger a really unfortunate incident happened. The laptop side plug fell down and made contact with the wall jack as I was plugging it in causing a short. It ...
1
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2answers
18 views

Macs CPU temperature increases massively when charger is removed

So I was trying to kill a Java process the other day. I opened htop and looked for Java. This was the first time I really used htop so I figured I would set it up in a way I would like. I added the ...
3
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1answer
46 views

Lenovo X1 Carbon suddenly slows when AC is attached

Today I notice that my one year old laptop Lenovo X1 Carbon (Windows 8.1) is 2,5 times slower on everything, only when AC is attached. As soon as I detach the AC to go on battery, performance ...
0
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1answer
17 views

How to find what processes are eating up battery?

I have a new Surface 3 (a little over a month old) and in the past few weeks I have noticed that the battery drains very quickly and does not charge when I am using it if it is plugged in. After ...
0
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1answer
33 views

Why are my computer graphics better on battery?

When I was playing games, I noticed lag spikes, but only when my computer was plugged in. I tried configuring all the power options available, but I was not successful. I know it was the graphics that ...
0
votes
1answer
89 views

Is it safe for keeping my laptop plugged in while updating to Windows 10 via windows update

I have Dell XPS-L502X(Early 2011) Laptop with 6-cell battery and currently I'am Downloading Windows 10 via Windows Update from windows 7 home Premium-64 bit. But my Internet Speed is just 512 kbps ...
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0answers
222 views

Windows 10, Instantly Goes to Hibernation/Sleep While on Battery, regardless settings

Event Viewer Kernel Power: The system is entering sleep. Sleep Reason: Battery I have had my own custom battery setup on Windows 7, where I could have max performance while on AC, but switch to ...
0
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2answers
35 views

Will keeping my new MacBook continously in charge damage the batteries? [duplicate]

I just bought a new MacBook, which I'm primary gonna use as a "desktop pc" (in office). Not always, but for large period of time (~ a month without moving it from my desk). I would like to ...
-1
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0answers
14 views

Power Issue- Not charging

I have an Acer Aspire V5-571 that is not registering the charger is plugged in. The ac adapter is in perfect known working condition. I have replaced the power jack thinking that was the problem, to ...
-1
votes
1answer
24 views

Is it possible to make a laptop behave as if it is working on battery?

Is it possible to make a laptop behave as if it is working on battery, while in fact it would be working on AC power? I have some HW problem with my laptop. It reboots for unknown reason every time ...
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1answer
111 views

ASUS Q502L “no battery detected” - Windows 8.1

I bought the specified model about one month ago. I immediately upgraded HDD to SSD and my system seemed to work fine for three weeks. I left my computer in my car one morning, and when I tried to use ...
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1answer
84 views

Is it okay to store a laptop for one year without taking any precautions [duplicate]

No precautions have been taken to store the computer. It is sitting upstairs on a bookshelf. It is an HP pavilion laptop. I read this Super User blog. I don't understand if this computer will ...
0
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1answer
25 views

How to lessen performance impact on Dell laptop with defective power system?

A few months ago, I replaced a broken cord for my Dell Inpsiron 15 laptop. The replacement cord (a slightly different model from the factory cord) worked perfectly until a week ago, when I started ...
0
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1answer
25 views

how to correct first battery discharge for smartphone

I would like to know how to take corrective action on the first charge cycle. I have just bought a new smartphone and completely discharged before full charging. However i just came across articles ...
2
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0answers
17 views

What are the temperature/pressure limits of Li-ion batteries? [closed]

So I found a bunch of things saying that Li-ion batteries will get damaged and may explode if exposed to "excessive" temperatures or pressures, but none of them defined what constitutes "excessive," I ...
0
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1answer
61 views

Is keeping a laptop connected to power supply harmful for its battery? [duplicate]

I heard that charging a Li-Ion battery all the time is practically harmful for the battery and significantly reduces its useful capacity over time. Is this true? Should I disconnect the power cord ...
0
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1answer
41 views

Low CMOS battery but it's brand new [closed]

When booting my old PC it says low CMOS battery so I replaced it with a spare battery which I bought a few years back. Upon booting from power-off state, it still says low CMOS battery. Is it ...
1
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0answers
48 views

How do i get 100% battery charge back with Samsung battery life extender?

I use a samsung netbook which i have been using for almost four months now. I have been using the samsung battery life extender since the first time i used the laptop. I decided to turn it off due ...
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votes
3answers
46 views

How to make laptop's battery last long? [duplicate]

My uncle warns me to use laptop after charge.But sometimes I use it during charging,like...when I am watching videos or working my homework.I want to know that is that good to use laptop during charge ...
0
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0answers
31 views

Battery #2 is not present in HP Compaqn 6910p

It showing Battery #2 is not present in My Hp Compaq 6910p laptop, can some help me that what is this Battery #2, i have inserted new battery pls help me
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1answer
17 views

Does a cron daemon drain a laptop battery significantly faster?

I would like to run a small script every hour to change my wallpaper. Does running a standard cron daemon (like fcron, cronie) cost a disproportional amount of battery lifetime? I would not expect ...
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0answers
26 views

Battery drains during hibernation (to disk) and even when completely shut down

I have a Thinkpad x220 (Debian Stretch) with a 6 cell battery which seems to be ok, according the the xfce4-power-manager. . The odd thing is that the battery drains during hibernation (to disk) at a ...
0
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0answers
208 views

APC Smart-UPS X 1500VA Warning State: Connect Battery

I have an APC Smart-UPS X 1500V which I just connected to a power source. When I turned the device on it was beeping and giving a flashy red light at the most right icon of the control panel. The ...
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0answers
52 views

Energy manager conservation mode is not working properly

I have a Lenovo Z510 with its official energy manager installed on it. Most of the times my laptop is plugged in and I've turned on conservation mode in energy manager in order to increase the life of ...
2
votes
0answers
36 views

How to fix the screen blackout in an HP Pavilion dv7-1240us

Many users of the HP Pavilion dv71240-us have had this screen blackout problem. After having the laptop on for a few minutes the screen goes black and there is no way to get it back to normal. Many ...
0
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1answer
92 views

Replacing laptop battery affects OS loading

I have a one and a half year old laptop with a win8.1 OS. On it first year, it prompt me that the battery is damaged and should be replaced. So I brought my laptop, along with its battery, to a ...
0
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1answer
87 views

ASUS laptop battery dead after a year

I have an ASUS laptop bought a year ago. Last week the battery wear level was at 20% and the very week after the warranty expired it suspiciously stopped charging fully and now, a week later it's at ...
0
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2answers
65 views

Does bad electrical grounding mess up a laptop?

I recently purchased a Macbook Pro retina display. When I use the 2 pin charger, and I touch the surface of the laptop I can feel electricity passing - basically laptop is vibrating softly. When I ...
0
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2answers
53 views

Motherboard keeps giving checksum error after installing new battery

I am repairing a computer with an ASUS M2NBP-VM CSM ACPI motherboard (I am not sure this is the correct description of the motherboard but, at least, this is what gets printed to the screen during ...
0
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0answers
76 views

Battery does not resume charging after power interruption, if brand new HP Envy notebook is powered off

I got this laptop just yesterday, and I have a weird problem. Configuration of laptop: CPU: Intel Core i7 5500U @ 2.4GHz (Turbo 3.0 GHz). CPU: Nvidia GeForce GTX 850M (4GB dedicated). RAM: 8GB ...
0
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0answers
21 views

OS X (host) on battery power with fullscreen VMware Fusion

I am running a Linux guest in VMware Fusion (6.0.6) on an OS X host (Macbook Pro). With AC power everything runs smoothly. When on battery and in windowed mode there are no problems either. However, ...
0
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0answers
66 views

How to update bios with windows exe file

I try to update my bios with a file which I downloaded from official Lenovo website.Finding update file is super easy but because of my battery doesn't charge anymore I could not update bios on ...
1
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1answer
95 views

External Battery Pack not Working with Laptop

I have an HP ProBook 4540s that has a very weak battery from years of use and abuse. I bought an external battery pack, a Poweradd 32000mAh with the intention of using it with my laptop. The battery ...
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votes
1answer
50 views

should I remove an old laptop battery to save energy?

Does the old battery of an old laptop use a lot of energy when the laptop is connected to AC? Does the power supply waste electricity trying to continually charge an old battery? If I remove the ...
0
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1answer
42 views

High CPU/MOBO temperature even after cleaning and reinstalling

Even after dissembling my laptop and cleaning it, the temp of my CPU and Motherboard hangs around 41+ degrees Celsius while idle and no apps running. It used to be much lower and my laptop gets really ...
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0answers
63 views

I cannot update bios because my battery doesn't work

I know there are similar questions asked before but none of them is helpful. First I tried bios.exe /forceit on DOs prompt on Windows it says it cannot complete the update because I don't have a ...
0
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0answers
59 views

How to properly calibrate new laptop battery which shows full capacity as ~20% of designed capacity?

I have a very unique problem as I can see. I have bought a new battery (not original brand) for my 3 years old Toshiba Satellite L750 (running Win 8.1 Pro) notebook. My old battery was about ...
2
votes
1answer
86 views

Plugged in not charging [duplicate]

I am using Lenovo Thinkpad E430. I have installed Windows 8.1 Pro 64 bit My battery charges up to 46%, and then it is showing "plugged in, but not charging". I tried many possibilities. 1. ...