Abstract: A system according to an embodiment may include: a first electronic device, a second electronic device, and a charging case, wherein the first electronic device includes a first battery and a first processor; the second electronic device includes a second battery and a second processor; and the charging case includes a third battery, a boost circuit configured to charge the first electronic device and/or the second electronic device with power of the third battery, and a bypass circuit configured to directly supply power from the third battery to the first electronic device and/or the second electronic device, wherein the first processor of the first electronic device may be configured to: identify whether the first electronic device and/or the second electronic device are/is mounted on the charging case; identify a remaining capacity of the first battery and the second battery in response to the identification of being mounted and determine the first electronic device having a larger remaining battery capaci

Abstract: A power supply device including a first charging accommodation, a second charging accommodation, a first interface electrically connected to a first power receiving device, and disposed in the first charging accommodation, a second interface electrically connected to a second power receiving device, and disposed in the second charging accommodation, a battery, and a processor configured to receive, via the first interface, first state of charge (SOC) information of the first power receiving device which is mounted in the first charging accommodation, receive, via the second interface, second SOC information of the second power receiving device which is mounted in the second charging accommodation, determine at least one charging parameter based on the first SOC information and the second SOC information, and charge the first power receiving device and the second power receiving device through the first interface and the second interface, respectively, based on the at least one charging parameter.

Abstract: The present disclosure relates to an electric dust collector for generating an electric field by a high voltage electrode formed of a polymer. An electric dust collector according to the present disclosure includes a high voltage electrode to which a high voltage is applied, composed of a thermoplastic polymer and an inherently dissipative polymer, and a ground electrode to be grounded to generate the electric field with the high voltage electrode.

Abstract: The present disclosure relates to an electric dust collector for generating an electric field by a high voltage electrode formed of a polymer. An electric dust collector according to the present disclosure includes a high voltage electrode to which a high voltage is applied, composed of a thermoplastic polymer and an inherently dissipative polymer, and a ground electrode to be grounded to generate the electric field with the high voltage electrode.