Hello the battery, for 5 months I have been showing a start/stop error in the display and accordingly does not work. Since I consider it not critical, I wanted to wait until the next workshop stay. For a few days now I have also shown an error message in the display: 12 V battery, critical charging error, Safe stop. Now we have not stopped for the first time, also everything worked perfectly. Also the jump-in goes perfectly. Even despite the short distances daily. Also no other failures noticed. Now I ordered the following charger: Dino KRAFTPAKET 4A-6V/12V intelligent and automatic battery charger