I was beginning my device satisfied. But then I realized that the battery in approximately 4 days independently empty even though the device was shut down completely. And again and again. I sent the unit, according to a statement MEDION Service. There one made with regard to the battery obviously nothing. The battery was apparently not changed and now I can this not even halfway charge. After 12 hrs. Charging time this is still half empty. The device is useless for me and I want to return this now.