The LC709209FXE-01TBG is a battery fuel gauge for 1-cell Lithium-ion/Polymer batteries. It utilizes the unique HG-CVR2 algorithm to provide accurate Relative State of Charge (RSOC) information without requiring an external current-sensing resistor. The device features an extremely low operational current consumption of 2 µA and communicates via an I2C interface. It also includes alarm functions for voltage, temperature, and RSOC, as well as State of Health (SOH) reporting to enhance battery safety. Housed in a compact WLCSP12 package, the LC709209FXE-01TBG is ideal for power-sensitive and space-constrained applications like wearables, IoT devices, and smartphones.