Patent ID: 7855874

Claim:
An electronic apparatus comprising: a housing including a bottom wall, a top wall and a plurality of walls coupled to the bottom wall and the top wall surrounding a periphery of the housing, the top wall including a palm rest portion situated toward a front wall of the plurality of walls; a pointing device partially exposed on the palm rest portion of the top wall; and a battery unit positioned to form a part of the bottom wall of the housing, the battery unit including a plurality of battery cells, and a casing having an upper surface and a lower surface, the casing comprising a first portion storing a battery cell, the first portion being formed by a first section of the upper surface and the lower surface of the casing, a second portion storing a battery cell, the second portion being formed by a second section the upper surface and the lower surface of the casing, and a third portion arranged between the first portion and the second portion and formed by a recessed portion of the upper surface and the lower surface to overlap a portion of the pointing device, a distance between the recessed portion of the upper surface and the lower surface is less than a distance between either the first section or the second section of the upper surface and the lower surface, the third portion including a first rib arranged between the upper surface and the lower surface.