NOVELTY - A high-energy totally airtight lead acid battery comprises positive electrode plate comprising positive plate grid lead alloy material, negative electrode plate comprising negative plate grid lead alloy material, electrolyte comprising 129 g/cm3 sulfuric acid, 1 vol.% phosphoric acid and 0.001% dihydroxy sodium phosphate, a battery separator plate comprising boron-containing fiberglass, and outer shell comprising acrylonitrile-butadiene-styrene (ABS) plastic.    USE - A high-energy totally airtight lead acid battery for electric vehicle (claimed).    ADVANTAGE - The battery has a one-time discharge time of up to 60 minutes, 120% higher than international standards, ten-hour energy to weight ratio of up to 44 W-hour/kg, and cycle life of over 350 times. An electric vehicle can run 80-100 km by charging one-time. The battery has a regular service life of more than one year.    DETAILED DESCRIPTION - A high-energy totally airtight lead acid battery comprises positive electrode plate comprising plate grid alloy material including lead (Pb), 0.01-0.5% bismuth (Bi), 0.1-0.8% antimony (Sb), 0.01-0.05% copper (Cu), 0.01-0.05% aluminum (Al), 0.1-0.8% tin (Sn), 0.05-0.2% arsenic (As), and 0.01-0.05% silver (Ag). A positive active substance composition is prepared by adding sulfuric acid solution (3.7 L) to lead powder having oxidation degree of 75-80% (100 kg), adding 1200 mesh black lead (200 g), PTFE latex (300 g), and 1200 mesh zirconium oxide (100 g), coating on positive plate grid, and solidifying for 96 hours. A negative plate grid alloy material comprises Pb, 0.08% calcium, 0.06% bismuth, 0.02% copper, 0.6% tin, 0.02% aluminum, and 0.02% selenium. A negative active substance composition is prepared by adding sulfuric acid (3.4 L) to lead powder having oxidation degree of 75-80% (100 kg), 0.2% barium sulfate, 0.18% humic acid, 0.2% alpha , beta -naphthoic acid, 0.03% nitrogen dispersant, and 0.2% tungsten, coating on negative plate grid, and solidifying for 96 hours. The electrolyte comprises 129 g/cm3 sulfuric acid, 1 vol.% phosphoric acid and 0.001% dihydroxy sodium phosphate. A battery separator plate comprises boron-containing fiberglass. Outer shell comprises acrylonitrile-butadiene-styrene (ABS) plastic. Positive and negative plates are solidified and assembled into the lead acid battery.