Disclosed are multilayer, porous, thin-layered lithium-ion batteries that include an inorganic separator as a thin layer that is chemically bonded to surfaces of positive and negative electrode layers. A CPU 147 acquires data size in each module by referring module control information for a received DII,. The circuit may select a bit based at least in part on the most frequent occurrence of one of a plurality of values. The coefficient \u03b1 is dynamically set according to a parameter \u201cn. Communication via the secure communication and the power transmission of the power transmission unit may be performed at timings that do not temporally overlap with each other.