Conventional or the modern maintenance free like what Shelly is refering to.
I am refering to the maintenance free (lead Calcium) and not the sealed Gel Cell or the spiral wrapped battery. They are obviously much better than the lead antimony type battery. Shelly mentions you can add water if you like but if the charging system is set spot on and if you don't live in the desert, you probably will never have to. All the vehicles I have with these I seldom if ever touch the battery cable terminal ends. The lead Calcium composition reduces the gassing and water loss. I wish they would make the regular flooded TAR TOP batteries of this design! They always need water and are always sweating out acid fumes The battery I mentioned sounds like the one Shelly has but is it a low profile or compact design? Now we know that one will work just fine. The series 62? Sean, what are the dimensions and what was it intended for?