Unlike most other manufacturers, we prefer to conduct tests in the most realistic way possible. Our goal is to provide results that reflect everyday use and the real-world conditions an average user faces. That's why we've designed a procedure that simulates a common yet simple scenario, avoiding artificial tests that don't represent daily use.

Test Environment Setup

Full Charge: Make sure the battery is at 100% before starting the test. Plug the laptop into a power source until it reaches a full charge.We recommend performing a battery calibration before proceeding with this test;  here. you can find more information about it

Disconnect All Unnecessary Peripherals: To avoid unnecessary power consumption, disconnect everything such as USB devices, Ethernet cable, HDMI, etc.

2. System Configuration for the Test:

Before starting the test, adjust the following settings to ensure consistency in the results:

Disable

 

Automatic screen dimming.

Automatic screen turn-off (set to "Never").

Automatic power saving features.

Automatic sleep or suspend mode (set to "Off").

Any battery-saving limitations set in the BIOS.

Enable

 

Power mode set to "Power Saver."

Display battery percentage.

Screen brightness at 50%.

It should look like this:

3. Battery Life Test Execution:

• Unplug the Charger: Once the system is set up and the battery is at 100%, disconnect the laptop from the power source to start the test.
• Content Playback: To get consistent results, play a video on loop. You can download the test video we use here:

from here   Monitoring: Observe and record the battery life at regular intervals (100%, 75%, 50%, 25%) until the system automatically suspends upon reaching a critical battery level.

4. Results Analysis:

After the laptop suspends, plug in the charger and power the device back on. Check the exact time when the video playback stopped to determine the total battery life during the test. If you weren’t able to record the shutdown time, you can retrieve the last log entry using the command:
sudo journalctl (this is only possible on installed systems; it won’t work on a Live USB).

You can use the "Power Statistics" tool already installed in Ubuntu LTS to review the results.Compare the battery duration of your Slimbook. Refer to your Slimbook's technical specifications to determine the expected battery life for your model.

Note: Consider environmental conditions during the test, such as temperature, as this can also impact battery performance.