Rechargeable battery power supply starter and cell balancing apparatus

When a voltage applied to a first capacitor (6) connected to an output of a power generator (4) in parallel is equal to or larger than a threshold, a starter signal output from a monitoring circuit (10) to a control circuit (14) is set from a low level to a high level. The control circuit (14) self-starts, and a first switch (8) arranged between the power generator (4) and a cell balancing circuit (13) is turned ON. Electric power for equalizing an output voltage of each of a plurality of rechargeable batteries of a battery pack (3) is supplied from the power generator (4) to the battery pack (3) via the cell balancing circuit (13).