CHARGER FOR SECONDARY BATTERY

摘要

A charger (1) for a secondary battery capable of charging any secondary battery with a charging rate of substantially 100% regardless of the type or version thereof comprises a voltage value increment device for incrementing a check voltage level at a specified pitch from a lowest voltage level lower than a rated full charge balance voltage level, a selector switch (58) for switching the charging voltage to a specified charging application voltage level or the check voltage level, a first judging means for making a decision whether a current level detected by a current detecting section (46) is lower than a criterion level or not, and a second judging means for making a decision whether the time required by the first judging means for making current affirmative decision after previous affirmative decision exceeds twice of the time required for making the previous affirmative decision after the preceding affirmative decision.