Abstract: A battery pack apparatus includes a flexible battery pack with an attachment component for attaching the battery pack to and supporting the battery pack on the arms of goggles or eyeglasses worn by a user, the goggles/eyeglasses supporting an electrical device requiring power from the battery pack. The flexible battery pack counter-balances the weight of at least the electrical device when the goggles/eyeglasses are worn by the user. The battery pack apparatus includes a controller that may be wired or remote and that is operable to control the operation of the battery cells within the battery pack.