EFFECTS OF OVARIECTOMIZATION AND SYNOVEX-PLUS IMPLANTS ON THE SOMATOTROPIC AXIS IN FEEDLOT HEIFERS

A portable electronic apparatus comprises a housing for facilitating battery exchange therein. The housing has an opening for containing the battery. The opening has first and second apertures for permitting the battery to be pushed directly into contact with a retainer. Access to the battery is unobstructed to expedite battery exchange and to permit movement of the battery in different directions through the housing opening. Multiple retaining arms can have arcuate surfaces for holding the battery. The housing can have multiple retaining arms having complementary battery holding surfaces and can have two housing sections attached to the multiple retaining arms. Each of the two housing sections can be attached to retaining arms each having an arcuate surface for contacting the battery, and the retaining arms can be oriented in an interleaved configuration.