Why does the Xiaomi Pad 7 fail to power on after a long period of inactivity?

Similar to smartphones and electric vehicles, devices with built-in lithium-ion batteries experience self-discharge over time, which causes the battery to gradually lose its charge even when not in use. If the battery is left depleted for an extended period, it can reach a state of deep discharge, which makes it difficult for the device to power on immediately. The Xiaomi Pad 7 is equipped with an 8850mAh high-capacity battery, and when the battery is fully drained, it requires a longer charging time to reach the necessary voltage to power on.
If your tablet has been unused for a while and is not turning on, we recommend charging it for at least 20 minutes before attempting to turn it on. This gives the battery enough time to accumulate charge and allow the device to power up.