Battery unit for lens-fitted photo film unit

摘要

A lens-fitted photo film unit (11) contains a battery unit. The battery unit has a battery (50), which includes positive and negative battery electrodes (50a, 50b). A battery case (51) is formed from insulating material, and contains the battery. An elastic cap is included in the battery case. First and second contact segments (52, 53) are thrust through respectively the elastic cap in a watertight manner, and contact respectively the positive and negative battery electrodes, for external connection of the battery.