The present disclosure is provided with a power station including: an inverter for converting a direct current outputted by one or more battery packs into an alternating current; a rectifier for converting an alternating current into a direct current for charging the one or more battery packs; at least one battery pack interface configured to removably receive the one or more battery packs, that is originally used as a power source for a handheld electric power tool or a garden tool. A power system includes the power station, the one or more battery packs and an external electrical device coupled to the power station.