TI (Texas Instruments) BQ20Z40PWR-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 Type: Surface Mount Operating Temperature: -40?°C ~ 85?°C Package / Case: 20-TSSOP (0.173", 4.40mm Width) Series: Impedance Track?„? Voltage - Supply: 2.4 V ~ 2.6 V