Abstract: A portable power source includes a main body and a power button. The main body includes a receiving portion. The receiving portion defines a receiving groove and includes a protrusion received in the receiving groove. The protrusion includes a contact switch. The power button includes a button body and a latching arm. The button body pushes the contact switch to turn on/off the portable power source, and the latching arm rebounds the button body away from the contact switch.

Abstract: A power button structure for a mobile power pack is disclosed, wherein the mobile power pack has a housing having a front end defining two output ports, an input port and a power button accommodating portion. The power button accommodating portion includes a receiving room, a hollow protrusion in the receiving room, and a recess below the receiving room. A power button has a shelled pressing portion and a U-shaped holding portion extending downwardly from the pressing portion. The pressing portion is attached to the hollow protrusion and when the pressing portion is pressed a contact switch which is located in front of the hollow protrusion is activated. The holding portion extends downwardly inside of the recess and is located between a front side wall and a rear side wall of the housing defining the recess.

Abstract: A portable power source includes a main body and a power button. The main body includes a receiving portion. The receiving portion defines a receiving groove and includes a protrusion received in the receiving groove. The protrusion includes a contact switch. The power button includes a button body and a latching arm. The button body pushes the contact switch to turn on/off the portable power source, and the latching arm rebounds the button body away from the contact switch.