A method of battery charging is to be implemented by an energy station communicable with a cloud server that stores reference battery identifiers. The method includes: detecting a provided battery identifier of a battery, and transmitting the provided battery identifier to the cloud server so as to enable the cloud server to determine one of the reference battery identifiers that matches the provided battery identifier, and to determine to which one of a first lease code and a second lease codes the one of the reference battery identifiers thus determined corresponds; and being controlled to charge the battery when it is determined that the one of the reference battery identifiers thus determined by the cloud server corresponds to the first lease code.