• High-quality button batteries made of stainless steel and zinc-manganese materials. • Lithium core for long life and stable performance even in constant-use devices. • Safe voltage with stable chemical components that protect connected electronic devices. • Leak-proof design with stainless steel sealing to prevent acid leaks and short circuits. • No mercury, lead, or chromium for a lower environmental impact. • Exp of up to 3 years if stored in a dry place at room temperature.