I’m just doing a maybe unusual battery test. I bought a used vehicle this year. Unfortunately I don’t know how old the battery is. I couldn’t get any information about it from the seller either. Battery: Varta 44 Ah 1K0 912 105 220 A DIN 360 A EN/SAE Vehicle: VW Caddy Ecofuel Bj 2009 80kW 1984 ccm I drove yesterday an hour to charge the battery relatively fully. At home at 18:00 I then removed the battery and put it in the freezer. (-20° C). Today I want to test the battery around 10-11 o’clock. Thus the battery should have cooled quite well. To load the battery I have unfortunately only one GYS TBP 100. Yesterday at 21:20 the battery had an idle voltage of 12.73 volts. Today 08:30 12.69 volts I am already eagerly looking forward to the measurement results.