Hello, first of all I hope that I have landed in the right forum, if not, please move the thread. My car battery worries me something that may be unfounded, so I wanted to check here, with people who have a clue. I drive a Hyundai i30 GD, built in 2012. The following problem: Last year at the end of April, my battery fell after just over 3 years and I bought a replacement battery (Varta Blue), which my neighbor gave me Since I don’t drive much and if most short distances, he advised me that I should also buy a battery charger. I then bought the Cartrend MP3800 and thought that it was okay, it hung on every 5-6 weeks in the summer, in the winter now every 2-3 weeks. Now I had the charger on it recently on Saturdays and it showed me after two hours that the battery was fully charged. I was then on Wednesdays during the inspection and there you have among other things also d he battery checked, Ergbnis: Condition: 95%, charging capacity: 22%! Over this 22% was and still I am quite terrified, because I had charged the battery just a few days before according to the charger. I did not drive at all on Sundays and Mondays, Tuesdays 5 kilometers and Wednesdays 30 kilometers to the workshop (inspection). According to this diagnostic device there are no errors. I had the diagnostic device in the workshop attached last year, too, to check if somewhere from I also had the alternator checked, everything with positive result, i.e., no mistakes. Do I get too much head and are the above described 22% normal due to the current weather conditions (just over 0 degrees) and my driving profile? I still have a year warranty with my Hyundai i30, but I don’t know what to tell the workshop, which, according to the diagnostic device, do not find any errors. I now also have the cartrend against a CTEK MXS 5.0 changed, because that is supposed to be the better device. I am very grateful for tips and help, maybe I only worry unnecessarily.