I have multiple 12V batteries, some small ATV starter batteries (12Ah and 9Ah) and some deep cycle (120Ah and 97Ah).
- Can I connect all those batteries to the same battery tender in parallel?
- Could I get only two chargers one for the small batteries and one for the large one?
At the moment the age of the batteries aren't the same. Some battery at full charge are around 13.4 and some 12.9.