Abstract: A charger includes a first housing, a second housing connected with the first housing, and a PCB assembled between the first and second housings. The first housing is defined with a plurality of battery chambers. Each battery chamber is assembled with first and second resilient plates for respectively contacting positive and negative poles of a rechargeable battery. Each resilient plate has a contact portion and a soldering portion. A circuit system is defined at the PCB and includes an AC-DC circuit, a charging circuit, and a power output and input circuit. The circuits are connected with each other and connected with the soldering portions of the first and second resilient plates of each battery chamber. A power input socket and a power output socket are formed to connect with the power output and input circuit.