Abstract: A battery housing module having a housing and a battery spring is provided. A slot having a groove is formed on the sidewall of the housing. The battery spring comprises an elastic portion for contacting one end of a battery, wherein the width of the elastic portion of the battery spring is smaller than the width of the groove. A contact portion electrically connects a printed circuit board assembled with the housing. A connection portion connects the elastic portion and the contact portion, wherein the width of the connection portion of the battery spring is larger than the width of the groove. During assembling, the elastic portion passes through the groove of the slot, the connection portion is inserted into the slot and is restricted by the groove, and the connection portion, which slides in the slot until, contacts an upper surface of the slot when reaching the contact portion.

Abstract: The present invention provides a testing device for testing an automatic exposure function of a digital camera. The testing device includes a holding device, a light box, and an optical module. The holding device is used for holding the digital camera. The light box is used for providing a light source. The optical module is disposed between the holding device and the light box for changing a light intensity of light source projected onto the camera. The optical module includes a rotation device. A driving device is used for driving the rotation device to rotate, and a plurality of optical lenses with different light transmission rate are disposed on the rotation device.