Hello, my battery (EFB) has been stuck to a charger for more than 24 hours, but it didn’t get full. Measured with multimeters after it had calmed down an hour was 12.2-12.3 volts charger is the Bosch C3 Have now made me a battery monitor, which then also told me that si is charged to 51%. I then made the C3 again and measured with the current plier. Although the battery is only 50 % charged, the device went only to the 3,8A Charging voltage, but then immediately to 0,8A. So this 14.4 volts you can see, for example, when the alternator is charging, I could never measure on the battery here. I tried this several times, was always the same. Just put it in AGM mode, also there is a short 3,8A then 0,8A. I’ve been driving for an hour now and according to the guard I am on >90%. What is the reason why it can’t hold the charging voltage, on the device (that’s new) or can it have another reason? VG