Surface Book 2 suffers from power issue that drains its battery quickly while playing high-end graphics intensive games or using VR even when connected to power supply. During intense gaming scenarios with Surface Power Mode Slider set for Best performance, battery discharges while connected to the power supply. Below are the different method to resolve this issue.
Lower Screen Resolution
Step 1: Right-click on the Desktop and select Display settings > Resolution.
Step 2: Select lower resolution. Check out different resolutions and select the one that suits you best.
Update NVIDIA Drivers
Step 1: Right-click on Desktop and select NVIDIA Control Panel.
Step 2: Select Manage 3D Settings > Global Settings.
Step 3: Open Power Management Mode” and select Optimal Power mode.
Step 4: Ensure that you keep the settings at the Medium level.
Step 5: Apply the settings and restart Surface Book 2.
Check Power Consuming Apps
Step 1: open Settings > System > Battery and See which apps are affecting your battery life. This will bring up a list of apps that are hogging battery alongside the percentage of battery consumed.
Step 2: You can also change the Time Period and then change or uninstall the apps consuming maximum battery.