| 摘要 |
PROBLEM TO BE SOLVED: To provide a charger the circuit elements of which receive less load and that has long life. SOLUTION: This charger comprises a charging current controlling circuit 5 capable of varying a current value and a cell voltage detecting means 8 that detects the voltage of secondary cells 7. By varying the charging current in accordance with the cell voltage change at the time of charging, no large burden is applied to the circuit elements even without using a constant current circuit. Also, by increasing the charging current at such cases where the cell voltage change is small, it can be made noticeable and the accuracy of detecting full charging can be improved.
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