TI (Texas Instruments) BQ20Z45DBTR-R1 Battery Type: Lithium-Ion (Li-Ion), Lithium-Polymer (Li-Pol) Function: Fuel, Gas Gauge/Monitor Lead Free Status / Rohs Status: Lead free / RoHS Compliant Mounting: Surface Mount Mounting Type: Surface Mount Operating Supply Voltage (max): 25V Operating Supply Voltage (min): 4.5V Operating Temp Range: -40C to 85C Operating Temperature: -40?°C ~ 85?°C Operating Temperature Classification: Industrial Package / Case: 38-TFSOP (0.173", 4.40mm Width) Package Type: TSSOP Pin Count: 38 Series: Impedance Track?„? Type: Gas Gauge/Protection Voltage - Supply: 4.5 V ~ 25 V