LEAD-BASED ALLOY FOR LEAD-ACID BATTERY, GRID FOR LEAD-ACID BATTERY AND LEAD-ACID BATTERRY

Provided is a lead-based alloy for a lead-acid battery, comprising not less than 0.02% and less than 0.05% by weight of calcium, not less than 0.4% and not more than 2.5% by weight of tin, not less than 0.005% and not more than 0.04% by weight of aluminum, not less than 0.002% and not more than 0.014% by weight of barium, and the balance of lead and unavoidable impurities.