We first tried to detect this with OBD devices without removing the battery, but we saw that it was not healthy. If the 3rd and 8th series of a 10 series battery are faulty, the device cannot fully show the faults after the 3rd series. He’s right, because if the streak is broken he won’t be able to reach the next groups. That’s why we first disassemble your battery with clean workmanship. We diagnose the malfunction with our various detection devices and send you a video.