An over-voltage protection circuit for a mobile device comprising: at least one connector comprising at least two electrical contacts for connecting an external device and at least two internal contacts to a circuitry, wherein electrically operated switches are connected between the at least two electrical contacts, comprising a first electrical contact and a second electrical contact, of said connector and said internal contacts, wherein the electrically operated switches comprise a first electrically operated switch and a second electrically operated switch; the first electrically operated switch interconnected between the first electrical contact of said connector and a first internal contact to said circuitry; a control element for operating said switches, a first voltage determining unit configured to detect a voltage at a point between the first electrical contact and the first electrically operated switch, said first voltage determining unit being connected to said control element, and wherein said control element is configured to open the first and the second electrically operated switches based at least in part on a determination that the voltage detected by said first voltage determining unit exceeds a predetermined voltage limit, or to close the first and the second electrically operated switches based at least in part on a determination that the voltage detected by said first voltage determining unit does not exceed the predetermined voltage limit, the second electrically operated switch interconnected between the second electrical contact of said connector and a second internal contact to said circuitry, wherein said control element is respectively connected to each said electrically operated switch to control said switches, wherein said over-voltage protection circuit further comprises a further first voltage determining unit to respectively detect a voltage at a point between the second electrical contact of said connector and the second electrically operated switch, wherein the second electrically operated switch is connected to said control element, wherein said control element is configured to open the first and the second electrically operated switches based at least in part on a determination that the voltage detected by said further first voltage determining unit exceeds the predetermined voltage limit, or to close the first and the second electrically operated switches based at least in part on the determination that voltage detected by said further first voltage determining unit does not exceed the predetermined voltage limit. at least one connector comprising at least two electrical contacts for connecting an external device and at least two internal contacts to a circuitry, wherein electrically operated switches are connected between the at least two electrical contacts, comprising a first electrical contact and a second electrical contact, of said connector and said internal contacts, wherein the electrically operated switches comprise a first electrically operated switch and a second electrically operated switch; the first electrically operated switch interconnected between the first electrical contact of said connector and a first internal contact to said circuitry; a control element for operating said switches, a first voltage determining unit configured to detect a voltage at a point between the first electrical contact and the first electrically operated switch, said first voltage determining unit being connected to said control element, and wherein said control element is configured to open the first and the second electrically operated switches based at least in part on a determination that the voltage detected by said first voltage determining unit exceeds a predetermined voltage limit, or to close the first and the second electrically operated switches based at least in part on a determination that the voltage detected by said first voltage determining unit does not exceed the predetermined voltage limit, the second electrically operated switch interconnected between the second electrical contact of said connector and a second internal contact to said circuitry, wherein said control element is respectively connected to each said electrically operated switch to control said switches, wherein said over-voltage protection circuit further comprises a further first voltage determining unit to respectively detect a voltage at a point between the second electrical contact of said connector and the second electrically operated switch, wherein the second electrically operated switch is connected to said control element, wherein said control element is configured to open the first and the second electrically operated switches based at least in part on a determination that the voltage detected by said further first voltage determining unit exceeds the predetermined voltage limit, or to close the first and the second electrically operated switches based at least in part on the determination that voltage detected by said further first voltage determining unit does not exceed the predetermined voltage limit.