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Short travel trips and the extremes of the summer and winter months can shorten the life of your car's battery. Keeping the battery in good condition by charging it frequently is the best way to avoid paying for a new battery. This Calibre 12-volt automatic battery charger features zero volt start-up, short circuit protection and 7 stage smart charging technology: Desulphation, Soft start, Bulk, Absorption, Analysis, Boost and Maintenance. These seven stages are designed to charge and extend the life of a 12-volt battery. This model features a robust 12V DC power supply mode and a selectable calcium charge mode. This 20 amp model from Supercheap Auto is suited for Lead acid, GEL, AGM, Maintenance Free and Calcium Batteries from medium-sized vehicles and SUVs up to 1500 CCA. This Calibre 20 amp battery charger is designed for regular daily use in the workshop that requires batteries to be charged quickly and safely.