This document describes a new type of battery that is safer and longer-lasting than current lithium-ion batteries. The battery replaces the flammable liquid electrolyte with a solid electrolyte made of ceramics and polymers. It also uses lithium metal for the anode instead of graphite. Tests showed the solid-state battery maintained over 90% of its original charge capacity after 500 charging cycles. It also had no risk of fire even when pierced with a nail. This new solid-state design could enable electric vehicles to drive further distances without charging.