In this  of the Ubuntu help it says that using Ubuntu reduces battery life than compared to using Mac/Windows. What does that exactly mean? Does "battery life" mean here the number of hours that you can use the laptop on battery, or the battery's lifetime and thus the number of years you can use your laptop?  Also, in terms of battery maintenance, is it better to use the laptop while plugged in on Ubuntu?. Does Ubuntu detach battery when it is fully charged, or when the battery was fully charged does it use the battery so that it falls to 99% and then charges that again?
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Last year I purchased a Dell Inspiron 5315 laptop shipping with Windows 7 preinstalled. I installed Ubuntu 10.10 alongside it with dual-booting. On upgrading to Ubuntu 11.10, I was upset to find I now get less than one hour of battery life! Windows 7 gives me 2.5 hours of running time.  Is there any possible explanation why  my battery is running out faster with Ubuntu? Can anybody tell me better power options?
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The battery back-up (BBU) model:   admin enables write-back cache with BBU writes are cached to the RAID controller's RAM (major performance benefit) the battery saves uncommitted and cached data in the event of a power loss (reliability)   If I lose power and come back within a day or so, my data should be both complete and uncorrupted.  The downside to this is that, if the battery is dead or low, OR EVEN IF IT IS IN A RELEARN CYCLE (drain/charge loops to ensure the battery's health), the controller reverts to write-through mode and performance will suffer.  What's more, the relearn cycles are usually automated on a schedule which may or may not happen in the middle of big traffic.  So, that has to be manually disabled and manually scheduled for off-hours if it's a concern.  Annoying either way.  NV caches have capacitors with a sufficient charge to commit any uncommitted-to-disk data to flash.  Not only is that more survivable in longer loss situations, but you don't have to concern yourself with battery death, wear-out, or relearning.  All of that sounds great to me.  What doesn't sound great to me is the prospect of that flash module having an issue, though.  What if it's completely hosed?  What if it's only partially hosed?  A bit corrupted at the edges?  Relearn cycles can tell when something like a simple battery is failing, but is there a similar process to verify that the flash is functional?  I'm just far more trusting of a battery, warts and all.  I know the card's RAM can fail, the card itself can fail - that's common territory, though.  In case you didn't guess, yeah, I've experienced a shocking-to-me amount of flash/SSD/etc. failure :)
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The issue is that I see a high percentage on the "Android OS" item in the Battery Usage, and I want to find out what is causing it. But let me say that I'm interested in diagnostics techniques and tools, rather than increasing the battery life, as you will see in the below figures that the battery isn't drained much faster than expected.  Here's the situation with the phone right now:   Last charged 13 hours ago I restarted the phone after charging it I have switched off everything (such as GPS, WiFi, Data network) I was on a 2G network all the time My only use from the phone during the day was a few minutes of WiFi, receiving two SMS messages, and a call that lasted less than a minute. I have auto-sync turned off   And here's the battery usage stat:   Android OS: 67% Display: 10% Cell standby: 9% Phone idle: 6%   The Android OS shows 1 hour and 30 minutes of CPU time, but the total time that the phone was turned on was less than 30 minutes, and I don't have anything active in the background.  The battery level isn't bad at all (80%), but considering that I haven't done anything with the phone (and that the phone has a 2500 mAh battery) I am curious to find out what is causing the battery usage.  Obviously, this should be caused by some background tasks that aren't listed in the battery usage. I am looking for ways, tools, and methods that enables me to diagnose this further and relate the 67% of the usage to actual applications.  Some additional information:  I have a Galaxy Note, with Gingerbread 2.3.6 installed. I have "Usage Timelines Free" installed (which wasn't running during the day), and it doesn't show any excessive CPU usage by any app that can lead me toward who's consuming the battery.  Related question (helpful, but didn't answer my question) :
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When there is less than 5% battery left on a mac, the battery indicator goes red and system performance significantly drops - presumably in an attempt to make that remaining 5% last a little longer.   Is there a way to manually trigger this, so that the system performance is low (and battery life longer), even when there is plentiful battery?   This would theoretically be a way of extending the number of hours on a battery beyond the rated amount.
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For the last 1.5 years I've tended to put my laptop in sleep mode rather than turn it off. Recently I started to feel it's not as fast as it was when I bought it, even if I restore a fresh Windows 7 image (I made it 1 week after installing the system for the first time).  Maybe it's just an impression, I'm not sure...   Can it be a result of putting my laptop in sleep mode? What computer parts get worn down over time? Is there software to test if these parts are worn?
7198
What lifetime can be expected of the typical hard disk? Or are there big differences between different types? And does it make a difference if it is used heavily instead of never being connected to system (for example serving as a backup medium)?
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Many people keep their laptops plugged in and charging when using them at home, and rarely if ever take them out of the home. This keeps the Lithium battery at 100% State Of Charge (SOC), which I understand shortens the battery life. It would seem to follow that the battery life could be optimised if there were some way of selecting "storage charge" on the laptop, whereupon the charging circuit would keep the battery at 50% SOC. This issue has become more pressing now that manufacturers have switched from removable Li-Ion battery packs to built-in LiPo battery packs. I'm guessing that all the necessary hardware is already present, and so this would be a relatively simple software fix. Is this an issue that has already been addressed and for which a solution is already available?
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There were so many discussions about an Ubuntu with RR. They were so many pros and contras. At the end ubuntu wont be changed, the 6 month cycle system wont be changed. Thats fine!   But because there are so many people who would like to use an ubuntu with RR Im asking myself why isnt there an Ubuntu Derivate with RR. I couldnt found one, there are a loooot of Ubuntu Derivates but no RR. Is it just impossible? I mean Ubuntu = 6 months cycle, so the derivate have to be a 6 month cycle too? Is there no other option? Or are there already some smart guys trying to solve this problem? Thank you!
19138
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?
10300
I've been experiencing a very annoying problem lately. Often, I've got my MacBook Pro connected to  power when I'm working from the office. At home, I often leave it unplugged until the battery is too low to continue at which point I plug it in. The problem occurs when my device is connected to a power supply. My battery indicator shows 100% charge which is fine. But sometimes the battery starts draining and the menu bar icon says &quot;Battery not charging,&quot; even when it's connected to a wall socket, and it keeps draining until absolutely dry. It doesn't even warn me the battery is running low because it shows &quot;Power source: Power adapter&quot; which I guess disables the Operating system low-battery warning. This has happened on multiple occasions. I've already tried several things, I've swapped chargers, swapped wall sockets, started with as few tools/apps running as possible. But the problem comes back. I also can't really tie this to a specific app or behavior,  AFAIK. Does anyone know what might be causing this behavior and what to possibly do about it?
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I handed my MacBook Pro (15" Touch bar) to the service centre in order to have the keyboard replaced. Now, when I check the battery cycle count, it shows "1". Before it was at "82".   Also, I'm getting a battery life of only 4.5 - 5 hours now.   Is there a way to find if my battery was replaced or not?
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How can I read the status of the battery on my MacBookPro from my own application?  Googling has so far only revealed APIs for device drivers to handle power events - there's nothing about user-land processes accessing this information.  thanks.
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I'm brand new to Linux. I just installed Ubuntu as a dual boot system on my HP Pavilion laptop.  Where should I start? I've tried to play around with Terminal over the last hour or so, but I'm probably not helping myself out. Any suggestions are welcome!
92207
I have just installed the macOS Catalina 10.15.5 update on my 11" Mid 2013 MacBook Air. The update is working fine.  The MacBook Air specifications on the Wikipedia page says that this model has a lithium-ion battery, 'tho I haven't unscrewed the case to look. But the new Battery Health controls in System Preferences → Energy Saver don't appear.  Not a lithium-ion battery? Or perhaps other differences in this model prevent Battery Health from showing up? Something else?
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I have two Mac book Pros:    A 2013 Unibody retina that I use every day An older 2006 model with removable battery that I use a couple of times a month (when not in use, it's not connected to the AC. I recently replaced the battery, as the old one swelled apart).   I use them as desktop replacements, so I don't use the battery that often.   What's the best way to prolong battery lifespan? - If keeping the machines hooked up to the AC is a bad idea, then for how many hours each day should I use the battery?    Here is my research: There's a lot of conflicting advice.   Calibration  A lot of sources, say you should calibrate the battery by letting it run down to 0% each month. For example, this , this  article. All these articles were written in 2013/12 and cite Apple.com as the source for this advice.  However, the  page makes no reference to calibration. Is this because calibration is a bad idea, or is it because Apple no longer sells devices with removable batteries and so the advice is different?  Deep discharge  Other sources, such as this  question, imply that letting the battery drain is a bad idea, so using the AC whenever possible is actually a good thing.   Please note I am talking about the overall battery life span (e.g. the time the battery has before it needs to be replaced) and not increasing the day-to-day hours of the battery.
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I recently installed Ubuntu 20.04 LTS on my Lenovo Ideapad Flex 5 and realized that battery life in Ubuntu is not as good as Windows. The battery drains faster in Ubuntu. I have seen the questions in Ask Ubuntu about this, but I haven't found anything that regards Ubuntu 20.04 LTS. I've done some research and found out that the battery drain is because most vendors optimize their drivers for Windows and with Linux, you have to hope that the kernel drivers do the job (which they usually do). After that, I researched how to increase my battery life and almost all sources I found recommended installing tlp or powertop or something similar to these. But I have a few questions.  Does tlp, powertop, and similar software actually affect battery life?  If the answer to 1 is yes (in a positive way), what would you recommend I install (such as whether I should  install tlp or powertop by itself or in a combination)?  Are there any other ways to increase battery life in Ubuntu 20.04?   Note: I am a beginner to Linux and Linux distros and do not want to mess with anything advanced that may negatively affect the system. I may not be able to immediately know how to tweak any of the aforementioned software, so please suggest any tweaks if they are needed to get results. And if it helps to know, here are my system specs: OS: Ubuntu 20.04.1 LTS x86_64 Host: 81X2 IdeaPad Flex 5 14ARE05 Kernel: 5.7.17-050717-generic CPU: AMD Ryzen 7 4700U with Radeon Graphics (8) @ 2.000GHz GPU: AMD ATI 04:00.0 Renoir (These were given by neofetch) P.S: If you need anything else, just ask. Thanks in advance!
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I was wondering what the difference between running and trying Ubuntu and I was also wondering if there was any downfall to running Ubuntu on a USB drive.