Various design aspects combine to preserve high capacity after long-term storage while enabling safe use down to -40 °Fahrenheit. Organic materials reduce the electrolyte solidification point to less than other battery types, optimizing storage and operation in low temperatures, while high-purity MnO2 has the optimal particle-size for high-rate discharge at low temperatures. Gas-suppressing materials, meanwhile, preserve capacity after long-term storage at high temperature. Our Anti-Leak Seal and short-circuit protections enhance durability.