A sealed maintenance free battery which never needs to be refilled.The lids on this series of batteries internally regenerate any gas that occurs during use or charging.The battery construction is based on the use of lead-calcium plates, which yet further reduces the water usage.The models VESMF60, 70, 85 and 105 are equipped with a “magic” eye which indicates the state of charge.This new line of batteries are offered instead of the current range Vetus maintenance free batteries.