Charger management circuit

The invention discloses a charger management circuit. The charger management circuit comprises a power supply detection circuit, a battery polarity detection circuit, a battery state detection circuit, a battery voltage detection circuit, a charging control circuit, a power tube charging output circuit and an LED indicating lamp control circuit; wherein the LED indicating lamp control circuit is used for controlling operative modes of the indicating lamp according to detection results of the detection circuits; the charging control circuit is used for controlling the power tube charging output circuit whether to charge lithium ion battery or not according to detection results of the detection circuits. The charger management circuit can monitor state of the lithium ion battery in real time, control charging current of the lithium ion battery and greatly enhance safety and reliability for charging the lithium ion battery and lengthen service life of the lithium ion battery.