QUICK CHARGING APPARATUS

摘要

A quick charging circuit for secondary battery comprises an alternating current source, a battery voltage detecting section including a constant voltage source section and two transistors and connected with said alternating current source, a charging current source section for the battery to be charged, and an indicating means for the completion of the charging. The battery is connected only between the common emitters of the two transistors in the battery voltage detecting section and the negative electrode of the constant voltage source section so that the two transistors will be reverse biased and thereby any fluctuation of the battery voltage in the final charging period will be reduced.