Patent ID: 8532717

Claim:
A voltage indicating circuit for a mobile phone battery, comprising a battery, further comprising a mobile phone baseband module and a battery voltage detection module, wherein power input terminals of the mobile phone baseband module and the battery voltage detection module are coupled with an anode of the battery, and a detection signal output terminal of the battery voltage detection module is coupled with a communication terminal of the mobile phone baseband module; the battery voltage detection module detects an output voltage of the anode of the battery and outputs a mobile phone battery voltage detection signal to the mobile phone baseband module through the detection signal output terminal; and the mobile phone baseband module receives the mobile phone battery voltage detection signal through the communication terminal and indicates a voltage of the battery according to the mobile phone battery voltage detection signals; wherein the detection signal output terminal of the battery voltage detection module comprises at least two interrupt signal output terminals, the communication terminal of the mobile phone baseband module comprises at least two signal receiving terminals, and the interrupt signal output terminals and the signal receiving terminals are coupled in a one-to-one correspondence way; the battery voltage detection module outputs a group of corresponding interrupt signals through the at least two interrupt signal output terminals according to a position of the detected output voltage of the anode of the battery in preset different voltage ranges, and the mobile phone baseband module displays a range in which the voltage of the battery is located according to the group of interrupt signals received.