NOVELTY - Combined thin battery structure comprises metal first plate (1) having jointing slices (11), first contacting slices (12) forming upwardly from peripheral edges; plastic frame (2) having jointing grooves (21) and fitting grooves (22) formed from peripheral edges; battery module (3) having battery (31) electrically connected with circuit board (32); and metal second plate (4) having fitting slices (41) and second contacting slices. The first plate stably contacts the second plate.    USE - Combined thin battery structure for enhancing electromagnetic interference (EMI) efficiency.    ADVANTAGE - The structure overcomes easily causes an unstable conduction between first and second plate.    DETAILED DESCRIPTION - Combined thin battery structure comprises metal first plate (1) having jointing slices (11), first contacting slices (12) forming upwardly from peripheral edges; plastic frame (2) having jointing grooves (21) and fitting grooves (22) formed from peripheral edges, jointing slices respectively inserted into jointing grooves; battery module (3) having battery (31) electrically connected with circuit board (32), and battery and circuit board installed into frame; and metal second plate (4) having fitting slices (41) and second contacting slices (42) formed downwardly from peripheral edges. The fitting slices are inserted into the fitting grooves, each of second contacting slices extended to form a flexible arm with a contacting surface. The contacting surfaces of the flexible arms respectively contacts first contacting slices via surface contact method. The first plate stably contacts the second plate.    DESCRIPTION OF DRAWING(S) - The drawing shows an exploded perspective view of the combined thin battery structure.    Metal first plate (1)    Plastic frame (2)    Battery module (3)    Metal second plate (4)    Jointing slices (11)    First contacting slices (12)    Jointing grooves (21)    Fitting grooves (22)    Battery (31)    Fitting slices (41)    Second contacting slices (42)