Battery defective?!

Hi @t all, had for a long time had the problem that my TT sometimes badly sprang up in the morning: The starter didn’t turn “so right” and besides, I had the phenomenon that the rev indicator started to “work” after about 2-3 seconds after the start process (it just remained these 2-3 seconds on “zero position”. Yesterday after work I wanted to start my car. I was lucky that it even started because there was almost no “juice” anymore in the battery seemed to be. So I turned off ALL consumers (radio, ventilation, air conditioning….) and first off to the BAB to “charge battery”. After I drove a good half hour I turned off the car for testing, waited a few seconds and started again. That went without probs. But this morning the disillusionment again: When starting almost GAR NO battery power was more there but I got the car still started on the last Rille. At the same time gi The control lights and the display are almost completely off! In addition, the date/time display was set to “0”. Just then I removed the battery (year of construction KW15/2000!…) and bought me a new battery in the accessories (12V/62Ah). Jeztz starts the car again perfectly! 🙂 I hope the start problems and the “macke” with the rev indicator was really due to the old battery. What do you mean?