BAC06AU BATTERY CHARGER USER MANUAL
BAC06AU Battery Charger Version 1.0 2019-12-12 Page 5 of 8
3 CHARGING PRINCIPLE
Fig. 1 Charging Principle Diagram
Charging is performed according to the battery charging characteristics and uses two-stage charging
method. Charging type is ‘constant current type’, which means when the battery terminal voltage falls
below the pre-set value, charging current will be constant; when the battery terminal voltage exceeds the
pre-set value, charging current will fall gradually with the rise of terminal voltage until the pre-set current
value is reached and charging transfers to floating mode. At this time charging current becomes small
gradually, and battery terminal voltage also rises gradually to the pre-set steady voltage value. When
charging current is less than 0.3A, battery is basically fully charged (charging indicator is off). Afterwards
charging current only offsets the self-discharging of battery. And long time charging does no harm to
battery. That is, charger can not only maintain battery full charging status, but also ensure the usage life
of battery.
