USB-connector within cigarette lighter socket of a vehicle

A car charger (10) includes a charger body (1), a cathode conducting elastic sheet (2) and an auxiliary elastic sheet (3). The charger body (1) has a housing (11) and a holder (12). The cathode conducting elastic sheet (2) has two elastic conduction arms (21) clamped between the housing (11) and holder (12). Each elastic conduction arm has a protrusion (211) exposed out of each through hole (111). The auxiliary elastic sheet (3) has two elastic sections (31) disposed between the holder (12) and the protrusion (211). The elastic sections (31) will provide a resilience force to the protrusion (211) when being squeezed.