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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43 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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75 views

How to keep Windows 7 CSC Service from running down my laptop battery?

I've a new laptop that lasts less than an hour on battery. I've bottomed out the culprit: cscservice. I've been manually turning the service off then on when I'm on battery power. Cycling the trick ...
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813 views

Force Windows 7 to think it is running on Adapter Power and not battery

Anyone know how to make a Windows 7 Laptop think it is running on AC Adapter power? This laptop (HP G62 series) has a usable battery which holds charge but it has a not-official power adapter which I ...
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1k views

My laptop won't power on after an unexpected shutdown

I have an HP 6930 Elite book. I was just charging it in the afternoon yesterday while making a Word document on it and it suddenly got shutdown. No warning, no alert, no notification, just a sudden ...
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0answers
186 views

Acer strange battery dissassembly issue

last week I bought an Acer M5-481T ultraportable laptop. Everything was working fine with the laptop and battery until I decided to disassemble it to upgrade the hard drive, which was a few days after ...
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402 views

Acer Aspire Laptop won't charge in Windows 7 Home Premium x64

I have an Acer Aspire 7750-6801 laptop running Windows 7 Home Premium 64 bit OS. The issue is that it will only charge sometimes when plugged in. I thought it might be a hardware issue, so I tried ...
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142 views

Trackpad and battery on stop working at same time

Gateway E-475M G Windows 7 Professional SP1 Synaptics TouchPad 15.2.20.0 Microsoft ACPI-Compliant Control Method Battery 6.1.7600.16385 It seems that when my battery stops working correctly, my ...
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50 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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65 views

laptop not charging with battery and not starting without battery

Me and my sister have identical laptops. Whilst i was using my laptop i noticed that the laptop was indicating it was charging however the battery power level was decreasing. So it knew the adapter ...
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37 views

OSX - Stop Bluetooth Low Battery Message

I've seen this asked before but never any solution. When using the Apple wireless keyboard and trackpad a message pops up when the battery level gets down to 15%. When you click the message away it ...
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36 views

How to make laptop only start charging when under 20% while always plugged in?

I want my laptop only to charge when under X% of battery is left, while always plugged-in to charger. I have a laptop that has to be up in running for long periods and I want to lower the ...
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130 views

Dell Vostro 3560: 3NB8W3 battery not recognized, problems with charging

I've been using standard battery for a while, but finally I bought extended battery (3NB8W3, 11.1v 8700mAh 97Wh). Sadly, my Vostro 3560 does not recognize battery properly. I always have "Plugged in ...
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146 views

Some CMOS Settings Not Retained on Reboot. Battery good

Some CMOS Settings Not Retained System: Dell Inspiron 546 Motherboard: DELL F896N 0896N Experience: Advanced Issue: Some CMOS settings are not retained after saving and reboot. Some CMOS / BIOS ...
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94 views

CMOS battery issue

The 5+ year old CMOS battery in my PC died and the BIOS lost it's settings. I replaced the battery but the same problem persists. As soon as I plug the PC into the power outlet, I get 4 beeps ...
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240 views

packard bell easynote te69hw cannot set screen brightness to maximum when charger is not plugged

I just bought a new laptop and there is something that's been annoying me, when am using the laptop with the battery only the screen brightness lower itself automatically, but the problem is that the ...
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272 views

My asus laptop shuts down unexpectedly when unplugged

My asus laptop shut down unexpectedly when unplugged ... even with battery charge over 50%. The OS installed is Linux, and it is set to shut-down at a critical percentage of 5%. It doesn't look ...
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252 views

Battery charge management - lenovo

I have a Lenovo Ideapad P500 with Linux Mint installed. For some reason the battery only charges up to 59% and then it stops. I've seen similar problems solved for Windows, but not for Linux Mint. Is ...
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497 views

Toshiba Satellite C50 A-1JM won't boot with battery plugged in

I am having some odd problems with my Toshiba Satellite C50 A-1JM laptop. For the last two days, it has not loaded past the boot screen for hours, if at all. When I force the laptop off and switch it ...
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92 views

Laptop battery completely discharges while in the laptop, even when not in use

My Laptop Battery completely discharges while in the laptop, even when not in use. I fully charged the battery, removed it from the laptop, and kept it separate. After 3 days I checked it and it was ...
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34 views

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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21 views

Using Perl to communicate with Nut

I'm trying to communicate with my UPS that's managed using NUT. I want to read values from it like line voltage, battery charge, etc. I don't want to send it commands to shut it down. At first I was ...
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140 views

Can short circuiting kill a USB cable?

I have a power strip and four things were connected to it. My air filter, laptop, Samsung Galaxy Tab, and Motorola Droid 4. For the phone and the tablet, there are actually 2 components to the ...
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132 views

30% CPU usage when charger unplugged. When plugged in, cpu usage drops to 2%

I have checked by external debugger and it seems that batteryservice:update start runs 10 times per second. Other battery processes are running very often too, only with charger unplugged. It's brand ...
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479 views

Removing support for Lenovo's Battery Safeguard “feature”

Lenovo laptops now include a Battery Safeguard "feature" that disallows use of third-party batteries in models made after May 2012 or so. It appears this "feature" is provided by a Windows driver as ...
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1k views

Dell Inspiron laptop not starting

I have a Dell Inspiron N5010 dual booting Windows 7 and Ubuntu. It was running fine earlier, but suddenly it started mistyping letters with multiple letters and special characters for one second and ...
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488 views

Battery life Samsung Series 7 with Linux (Mint, KDE)

I've been trying all the tricks I can find to reduce power usage on my Samsung series 7 (Ivy Bridge Core i7, AMD Radeon HD 8570M GPU) laptop (running Linux Mint Olivia, KDE version), but it all seems ...
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133 views

Trying to run computer off DC but monitor is always blank

I am trying to get a computer to run off a DC battery. The computer seems to start fine (the CPU fan spins and the hard drive whirs), but nothing displays on the monitor. It just stays blank, as if ...
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131 views

Solid State Battery vs Lithium (ion or polymer) Battery

Background: It's a hardware related question. I was suppose where should I ask this question, after reading http://meta.stackexchange.com/questions/57998/hardware-questions-and-stack-exchange I am ...
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178 views

Line Interactive UPS battery maintenance

I am going to buy a Line Interactive UPS (around 600VA/360W with one 12V/7AH Lead Acid battery - probably PowerWalker VI 650 LCD, or Cyberpower Value 600ELCD, or any other...) for my PC needs, and ...
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652 views

CPU performance monitoring and diagnosis Maximum Frequency drop

Question: what might be the reason why the maximum frequency goes down to 49%, while this is not sufficient to run existing processes? (please note if I am wrong in interpreting that CPU usage is ...
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0answers
48 views

Can I prevent Windows 7 from restoring my brightess setting when the power state changes?

I have a question regarding Windows 7. I have set different values for the screen brightness when on battery and when on AC power (in the power plan settings). If I manually change the brightness of ...
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94 views

Windows should display warning when on battery

I have purchased my first laptop recently. But, the problem is many times I forgot to connect it to power supply. Due, to which all of my battery get exhausted and I get warning when it is only 10% ...
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56 views

How can I confirm my new notebook battery is genuine?

I have just purchased a replacement for HP DV6 Pavilion laptop battery from a local store in my country. I am not sure that the battery is genuine. How can I check and confirm that the battery is ...
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455 views

How do I change power settings on my laptop to hear audio while running on battery?

I have a Lenovo ThinkPad with Windows 7. I can hear sound when my laptop is powered up on AC power. While on battery power I can not hear streaming media, such as YouTube. I was informed that I ...
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667 views

Dell XPS M1330 BIOS upgrade adversely affects battery behavior

I upgraded from A11 to A15 using the executable M1330A15 (via DOS) and was successful. Before the upgrade, I left the laptop alone for several months. The battery showed 4 out of 5 pips when ...
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229 views

Procedure To Operate Gateway M-6848 On Mains Only Without Battery Installed

Gateway support told me I could do this but since my system (Gateway model M-6848 running Vista Home Premium) is no longer under warranty (or it's some kind of state secret), they won't inform me of ...
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16 views

Laptop battery indicator goes off and on simultaneously

I have recently updated my Windows 7 to Windows 10. And already I have been facing a weird problem. The battery indicator says "Battery not Found" and after sometime its just normal. And sometimes the ...
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0answers
14 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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40 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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297 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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0answers
32 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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28 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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281 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
63 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
83 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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22 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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71 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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68 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
66 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 ...
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83 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 ...