A battery management device (3) is configured to detect a present state of an electric device, and control supply of electric power from a battery device (5) to a load (4) of the electric device. The battery device (5) includes a plurality of battery units...

An air conditioning system includes an air conditioning unit (1) and an electricity generating unit (2). The air conditioning unit (1) includes an expansion valve (11), an evaporator (12), a compressor (13) and a condenser (14) that cooperate to form a fir...