XC60 T6 Recharge just so TOT

4 weeks (EZ 12/21) I did it, now it is (temporarily) dead: After my XC60 T6 Recharge was not moved for six days, nothing happened yesterday, not even the doors could be opened. Volvo Assistance called, within 25 minutes the ADAC was there (that was really perfect!): The starter battery was completely empty before. The car was often driven on longer distances as a burner, therefore it could not have been a charged battery. All doors were (as always) locked, the “motor battery” was fully charged. A (recognizable) consumer was also not switched on (have the interior lighting e.g. never used…). Today to the dealer, battery checked, everything ok. Short form of conversation: Dealer: After 6 days the battery must not be empty yet. I: After 3 weeks than??? Dealer: This is in some way a moving computer. There can already be something hanging up. Hmmh… Are there similar experiences? Thanks and greeting, Tsep