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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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% ...
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1answer
61 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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6answers
8k 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
174 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, ...
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1answer
20 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). ...
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1answer
50 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 ...
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2answers
30 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
236 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 ...
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1answer
34 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 ...
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1answer
38 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 ...
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1answer
523 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
676 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 ...
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2answers
78 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 ...
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1answer
34 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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2answers
2k 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
117 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 ...
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1answer
40 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 ...
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1answer
42 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 ...
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1answer
95 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 ...
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1answer
58 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 ...
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0answers
100 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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3answers
60 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 ...
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0answers
106 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
25 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
70 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 ...
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0answers
2k 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
191 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 ...
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0answers
130 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 ...
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1answer
115 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 ...
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1answer
626 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 ...
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2answers
115 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 ...
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2answers
262 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 ...
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228 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 ...
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0answers
41 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, ...
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0answers
124 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 ...
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1answer
273 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
84 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 ...
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1answer
84 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
108 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 ...
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0answers
140 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
223 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. ...
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votes
3answers
149 views

Is it ok if I charge my IPad with the power adapter that I use for my Samsung Tablet?

My iPad version details are as follows: Model A1460 Complies with the Canadian ICES-003 Class B specifications FCC ID: BCGA1460 and IC: 579C-A1460 Serial: DMPKF3F4F18Y There is something wrong ...
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1answer
31 views

Is a battery with broken ACPI protected from overcharging?

I have accidently completely discharged an old laptop's battery and its ACPI is not working now. (Reporting 0% or no battery etc.) I think the mechanism of detecting voltage (or battery remaining) is ...
0
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1answer
184 views

Laptop charges the battery only when power-off

I have Lenovo Ideapad Z710. It is 5 months old. This started to happen yesterday. While I'm on Windows 8.1 it says that the battery is charging but in reality it is discharging. However, when I ...
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0answers
273 views

Battery stops charging at 60% after installing Ubuntu

I had Windows 7 installed on my Dell laptop. The battery was working correctly and charging to 100%. When I installed Ubuntu I noticed that battery is charging to 60% only. I thought it was just a ...
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0answers
440 views

How can I clean a wireless mouse in which the batteries leaked?

I have a wireless mouse and I noticed that I had stored it with batteries inside. I know that's wrong because this is what happens: The mouse was sitting on the keyboard so the acid leaked on that ...
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2answers
152 views

How to get to hibernate on Windows 8.1?

At the moment I've got two options. Sleep Shut down The first is associated with the closing of the lid. I'm unsatisfied with this option because the computer is still eating the power, hence ...
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0answers
117 views

Asus zenbook UX301L not warning about battery running out

For some reason, I no longer get the blue win8 warning message that used to say that my battery was running out. Instead of warning now my computer just suddenly turns off itself and if you didn't ...
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0answers
47 views

Took laptop apart, no longer will stay on while using battery

I took my laptop apart (Acer S7 392), very carefully noting each step of disassembly, in order to replace the keyboard. Now the laptop will not sustain power unless the charger is plugged in. I ...
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3answers
747 views

My laptop is plugged in, charging but power is not increasing

I'm using a Dell Inspiron 14 R. Yesterday I got the notification to plug the laptop into power source when the charge became low at 13%, so I plugged it to the power source and it showed charging. ...