Not mentioned is that draining your battery below 12.2 volts will also significantly shorten the life of your battery.
You didn't mention how old your battery is and/or how you will be charging it both when pluigged in as well as when under way.
If you are using the original, pre about 2012 Scamp
converter/charger you can get almost anything from undercharged to boiled. That said, also check the battery voltage when you are plugged in and let us know that number as well. As a hint, if it's not at least 13.2 volts when charging, you may never get a full charge.
Don't forget to check your water level add distilled water if low, then charge again.
Bottom line, Batteries are a very fickle item