Hi folks, first of all I created this thread as a WIKI, which means you can edit it, add your favorite tips and tricks, do & don’ts, or tutorials.
This thread will contain everything related to battery life on your Eve V tablet.
Tips and Tricks
Do not use a proprietary wireless (dongle) or wired mouse. Use a Bluetooth mouse instead. Personally, I would recommend either the Logitech MX Master or MX Anywhere 2
From my testing, playing a video from the microSD card vs. internal SSD has negligible impact on power consumption
Do not use the keyboard backlight unless you absolutely, really, have to. It is a huge battery drain (1-2 W translates to 2-3 hours). Source: 10 hours battery life
If you do have to, set the keyboard backlighting color to either Red, Green, or Blue, as it would then only light up one LED instead of two or three. Source: 10 hours battery life
Adblock helps in reducing the network transmission and CPU cycle required in browsing scenario.
Personally I disable Windows Defender and SmartScreen to save even more battery. Only do this if you know what you’re doing
Use Power Saving mode when possible, up to 2 hours of improvement. Source: Battery usage: artificial and real world test results. Here’s what happens behind-the-scenes when you activate Power Saving mode https://docs.microsoft.com/en-us/windows-hardware/design/component-guidelines/battery-saver
Use Tablet Mode when possible. Source: https://www.reddit.com/r/Surface/comments/79liqf/use_tablet_mode_to_save_battery_life_since_it/
Sick of switching modes? In Windows 8.1, you are the power saving mode button. Despite lacking “Power Saving Mode” or “Tablet Mode”, it would sip power when idle, just like Power Saving mode, and it would automatically switch gears to maximum performance when you need it. I manage to get 13 hours on average for browsing and OneNote. Check this out here Windows 8.1 for the Eve V.
Apps to avoid (and the alternatives)
Google Chrome and Mozilla Firefox, especially Firefox. We are looking at ~2h battery life improvement from ditching Chrome for Edge, and a whopping ~4h for doing the same with Firefox. Source: https://microsoftedge.github.io/videotest/2017-12/ (normalized for 48 Wh battery)
Google Drive is known to use more battery than other cloud storage solutions. I personally use OneDrive and MEGA with no issues on battery life.
Spotify. Use the web version at http://play.spotify.com/.
OneNote 2016 (Win32/desktop). Use the UWP version instead. When idle, desktop OneNote has constant disk writes to its files and very low CPU Usage while UWP OneNote gets suspended more often. Source: https://www.reddit.com/r/Surface/comments/7qjtsj//dspyasl/
VLC, MPC-HC, KMPlayer, PotPlayer, WMP. Use Windows’ built in “Movie and TV” video player. Source: https://www.pcworld.com/article/3023430/hardware/tested-vlc-vs-windows-10-video-player-the-winner-may-surprise-you.html, https://www.techspot.com/article/799-battery-life-analysis-video-playback/
If you got bad battery life, try to perform the following steps:
Do you have any USB peripherals plugged in? A single USB 3.0 peripheral could take up to 4.5 W of power, essentially doubling the power consumption of the tablet.
What’s your screen brightness? 100% brightness gets roughly half the battery life of 0% brightness!
Do you have the keyboard backlighting on?
Do you have any audio playing?
Open the Task Manager, go to “Processes” tab (first tab), as well as “App History” (third tab) after you checked Options > “Show history for all processes”, both sorted by CPU usage. See if there is an app with unusual CPU usage.
Use perfmon to monitor the power consumption. As a reference, this is the battery life that you should be getting under the standard configuration Battery usage: artificial and real world test results
Alternatively, you can use BatteryBar batterybarpro.com/ to keep tab on the power consumption from the taskbar
Perform the battery report, and power efficiency diagnostics by running the following command in Command Prompt with Administrator privilege.
powercfg /batteryreport /output %USERPROFILE%\Desktop\battery_report.html
powercfg /sleepstudy /output %USERPROFILE%\Desktop\sleepstudy_report.html
powercfg -energy -output %USERPROFILE%\Desktop\Power_Efficiency_Diagnostics_Report.html
As a general guide:
- 8W of power consumption means 6 hours battery life
- 7W of power consumption means 7 hours battery life
- 6W of power consumption means 8 hours battery life
- 5W of power consumption means 10 hours battery life
- 4W of power consumption means 12 hours battery life
- Less than 4W of power consumption? Stop reading, edit this wiki and add your tips and tricks
Usual suspects of high CPU usage
Windows Modules Installer Worker (TiWorker.exe). It is normal after you install an update or Windows components, such as adding a new language. It would take up to an hour after a Windows component install. For updates, it really depends on the size of the update itself.
Windows Defender. It is normal in a new install, as it needs to scan the whole system, including the Windows system files. Windows Defender doesn’t trust Windows.
Prevent Windows Search from indexing the drive while on battery
Copy the following text, and save it as a .reg file such as prevent_index_on_battery.reg. Make sure it is not prevent_index_on_battery.reg.txt
Then double click on the .reg file. You should get something like this:
Once it’s been imported, you don’t need the .reg file anymore, you can delete it.
Windows Registry Editor Version 5.00
Disable Windows Defender USE WITH CAUTION
Windows Registry Editor Version 5.00
[HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender\Real-Time Protection]
Reduce the WiFi card transmission power
From my experience, however, reducing the transmission power really hits the performance. I went from 300 Mbps to 6 Mbps, so if you got slow network speed after performing this tweak, you may want to revert it back to the original setting
Other articles worth reading
What kind of battery life are you getting?
- 4-6 hours
- 6-8 hours
- 8-10 hours
- 10-12 hours
- 12+ hours
(feel free to change your vote if your battery life has changed, such as if you see a change after following this guide)