outer electrode 303 in charging the power pole 2 the first charging electrode 402 and the second charging electrode 405 are connected to a charger for charging the battery 403 referring to fig1 in an alternative embodiment the positive electrode 410 is a metal shrapnel arranged at a central position of the cavity 407 and the metal shrapnel is a circle metal dome when the atomizing device 3 is connected to the power pole 4 the negative electrode 409 contacts the ribs 3031 of the outer electrode 303 and the positive electrode 410 contacts a distal end 3022 of the inner electrode 302 it is understood that the above described first connecting assembly can be mounted at the power pole 2 and the second connecting assembly can be mounted at the atomizing device 1 referring also to fig1 a charger connector 3 in accordance with a third embodiment is provided which includes a main body 5 the main body 5 has an interface 501 configured to be connected to outside power supply and a third connecting assembly 504 the interface 501 can be usb interface 501 the third connecting assembly 504 includes an inner electrode 503 and an outer electrode 502 insulatedly spaced from the inner electrode 503 in the present embodiment the outer electrode 502 has two ribs 5021 in charging the power pole 2 the third connecting assembly 504 inserts into the cavity of the electrode fixing base 406 of the power pole 2 and the third connecting assembly 504 and second connecting assembly 407 forms a lapping fitting the charger connector 3 then can be.