Multiple Battery Configurations for Space Utilization

Example embodiments relate to multiple battery configurations for space utilization. One embodiment includes a device. The device includes a primary battery. The device also includes an auxiliary battery configured to supply auxiliary electrical power. A first surface of the auxiliary battery is positioned along a first surface of the primary battery. The auxiliary battery is a thin-film battery. The first surface of the auxiliary battery has a smaller area than the first surface of the primary battery.