Salut with each other, We still have an old Honda Civic Diesel as an occasional second vehicle (such as a mercy bread story, has always been a reliable workhorse) which had a Macke in the spring and pulled the battery empty during the ride. The called ADAC knocked around the alternator and loaded the battery, afterwards everything was ok again. His diagnosis: coals have jammed. Now he got the same modifications again before the summer vacation, too scarce to make it even before the holiday This time it went so far that the whole tree lit up in the dashboard and Servo & Co had no support when pushing on the last meters of the driveway. Now, after the holiday, the old battery showed 0.0 volts, I thought my measuring device spins. New battery ordered and it is installed today, in the hope to drag the box to the workshop with working servo and brake power amplifier, there then LiMa and charge controller as well as cable check new battery, built-in, previously measured: 12.5 volts. Connected, measured: 11.4 volts. Häh? Plus cable from the battery to the fuse box is well warm. Battery is disconnected, measured: 12.4volts, 10 minutes later 12.5 volts. How would you assess the situation? What would you think is the evil culprit? I would hate to get a new LiMa listed if the fault lies with the charging controller or in a defective cable. My practical knowledge of the KfZ electronics l I would be very pleased to have something under my hardly existing theoretical knowledge of general electronics, about easily understandable explanations and hints. Thank you, Mudgius