In addition to the battery with a heavily corroded contact, the thin PCB contains a grand total of three ICs in addition to the analog circuitry. These were identified by [Spritetm] as an AM/FM tuner system IC (
a change in the output voltage, displaying a residual quantity of the battery or an assumed time capable of driving the device, or urging replacement or charge of the battery can be utilized without trouble, thereby providing the power generator with the high compatibility to the chemical cell....