The present invention provides a battery that includes: a lid plate provided with a terminal pull-out through hole and a baffling portion whose upper surface is configured in a projecting and/or recessed manner; an auxiliary terminal configured such that a lower portion thereof is connected to a metallic foil of a power generating element by being fitted into a battery container through the terminal pull-out through hole, and sealed and fixed to the lid plate by insulating and sealing members; a connecting conductor connected and fixed to an upper portion of the auxiliary terminal; and an external terminal having a bolt portion that projects upward from a base portion, the bolt portion being inserted through the terminal through hole of the connecting conductor from below, and the base portion being engaged with the baffling portion of the lid plate, thereby restricting rotation centering an axial line of the bolt portion.