Abstract: A capacitor module horizontally mounted on a PCB and including a case including a first side surface, an opposing second side, a first electrode pad and a second electrode pad disposed at the first side surface, and a third electrode pad disposed at the second side surface, and an electrolytic capacitor including a dielectric extending in a first horizontal direction, a first electrode contacting the first electrode pad and a second electrode contacting the second electrode pad, wherein the first electrode pad is spaced apart from second electrode pad in a second horizontal direction.

Abstract: A method of controlling a charging voltage, the method including: receiving first environmental information from an environmental sensor, setting a voltage level of the charging voltage to a first voltage level in response to the first environmental information; charging a secondary power source including at least one capacitor with the charging voltage having the first voltage level; receiving second environmental information from the environmental sensor; in response to the second environmental information being different than the first environmental information, changing the voltage level of the charging voltage; and charging the secondary power source with the charging voltage having the changed voltage level.

Abstract: A capacitor module configured to be horizontally mounted on a PCB and including; a case including a first side surface, an opposing second side, a first electrode pad and a second electrode pad disposed at the first side surface, and a third electrode pad disposed at the second side surface, and an electrolytic capacitor including a dielectric extending in a first horizontal direction, a first electrode contacting the first electrode pad and a second electrode contacting the second electrode pad, wherein the first electrode pad is spaced apart from second electrode pad in a second horizontal direction.