Hello, MBK Doodo 125 this morning no start possible, only calck, clack, clack. Battery completely discharge. Voltage approx. 8.4V Expanded, oh shock all cells almost empty !!! Dest. Water filled up and hung to the charger. Rescue attempt. After a few hours of voltage again Ok. 13.2 V battery built in, started and voltage measured with running motor. Hammer, 19.2 Volt then switched on with light still 18,0 V Much too much voltage that increases when giving gas still something. Is this now due to the voltage regulator or is there any other fault causer ???? Who knows each other from ? Greetings