A battery pack apparatus includes a battery pack having multiple rechargeable batteries arranged in parallel and heat medium passages formed therebetween. For each partition of a selected volume of the memory area, the logical files are captured along with volume and partition information and stored in an image file to enable logical restoration of the captured image. A coupling transmits the input force to the load bearing member and, a compressible reservoir containing dilatant fluid mounted between the housing and the coupling restricts the input force to the load bearing member caused by shock loading to the coupling. The pattern unit includes a light-transmittable first patter plate, overlappingly disposed on the inner surface of the candle main body. The base material includes a reinforcement layer having a top surface on which the adhesive layer is laminated, and a barrier layer formed on a back surface of the reinforcement layer.