Hello, how much volts should a new battery have at least? I ask because I bought a new starter battery yesterday, because my previous one was so weak that after about 30 minutes of heating the cars didn’t want to start any more. The old one was about 5 years old. I bought a 75Ah now and had my multimeter this morning. Had driven for a while yesterday and then switched off overnight. 12,4 volts. Shouldn’t it be anymore? O I’m wrong about him?