TI (Texas Instruments) BQ27425YZFT-G2B Battery Type: Li-Ion Output Voltage: 2.6 V Operating Supply Voltage: 2.8 V to 4.5 V Maximum Operating Temperature: + 85 C Minimum Operating Temperature: - 40 C Package / Case: DSBGA-15 Mounting Style: SMD/SMT Product Type: Fuel Gauges