Hello together, recently tried to leave my Opel Meriva A (BJ. 2007) and failed, I immediately realized that it must be due to the battery (many short rides and the cold). I have now bought such a charger with voltage indicator for the battery. Before charging it showed 12.4V and after charging now 12.8V. Can someone tell me if this value fits? Should I still replace the battery in the short or long term? Thanks in advance for your advice!