I used to ask a question about a heater from webasto, and today I had for the first time a problem with it, I set the heater as always at 5 o’clock, drive at 5.30 o’clock to work, so when I was at the car was the car warm, but the car did not jump, because the battery was too weak, did not do anything, has turned only very weak the starter, the clock from the heater has seen everything at 0, well I’m dan with my father’s car to work drive, after which was back home the car jumped on again, I drove around a bit afterwards I went to a free workshop which tested the akku, and told me that this would be still in order, I should put the heater next time on 15min who the dan again left the akku empty should I install a bigger one, what do you say to it??? I mean up to now this had always worked, ok this morning was also a bit colder as usual, how long do you leave the your stan heating so run??? ps. is still the first battery inside.