A power supply device 100 comprises a plurality of power storage devices 10 connected in parallel, and includes an NTC 40 that detects a temperature of each of the plurality of power storage devices 10, an FET 2122 connected to each of the plurality of power storage devices in series, and a control unit that controls ON and OFF states of the FET 2122. In some embodiments, the LED package includes a second portion surrounding the first plastic portion and exposing the mounting surface and the lower surface of the first plastic portion. A groove is formed in at least one of opposite main surfaces of each of the vibrational arms, and at least one mounting arm protrudes from the base portion. The method is adapted to test and verifying different power states of the computer system, including Standby, Hibernate, Shutdown, and Reboot, and can be executed without being limited by any computer-specific hardware. Additionally, injection molding cycle time optimization shows an improvement of about 12 seconds in overall cycle time utilizing a syndiotactic polypropylene blend with 5% mineral oil in comparison to a syndiotactic polypropylene without mineral oil.