The Xiaomi Pad 6S Pro consumes excessive power in standby mode initially due to its need to perform data and application updates after connecting to the internet. During the first use, the device downloads and installs these updates, which can increase power consumption. This initial surge in power usage occurs as the tablet ensures that all software and applications are up-to-date. Once these updates are completed, the power consumption in standby mode should normalize and return to more efficient levels. It is recommended to continue using the device for a while to allow the updates to finish and stabilize the power usage.