Batteries for vehicles that go unused for long periods or that need to be kept charged to make it through the winter can be maintained with the Deltran Battery Plus Charger 1 Bank 12V True Gel Cell model. Deltran Battery Plus Charger 1 Bank 12V True Gel Cell: * Keep vehicle batteries optimally powered when not in use * Charge any 12V lead-acid battery * Internal software that allows for a slightly lowered voltage level * Protects sensitive Gel Cell batteries from the dangers of overcharging * Easy to use in difficult spaces * Utilize a 4-step charging program * Safely functions in a fully automatic mode * Keeps batteries fully charged and ready to go * Model# 021-0156