According to your description, I suggest you:

1. Turn off WLAN and Bluetooth observation.

2. Turn on the power saving mode

3. Back up the important data of the tablet and restore the factory settings (enter the phone settings-reset-restore the factory settings).

If the fault still exists, because the flat battery is built-in, it is recommended that you take the purchase invoice and maintenance card with you during the warranty period, and send the flat to the nearest Samsung service center for inspection and maintenance. For more information about the service center, please visit.

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