You can expect that, while in a SuiteBox room, your device will use slightly more battery power than normal. This is because you are using your camera to capture your video, your graphics processor to render the video, and use of your WIFI to remain in the meeting. Any other applications running on your device at the time will use incrementally more power as well.
Please ensure you have at least 40% battery power before a meeting. If there is a risk of running out of battery power, you can help minimize your power usage by closing any unnecessary apps running in the background and turning off bluetooth.