3.7V lithium batteries are commonly used in many projects. However, the remaining power and voltage of the lithium battery are highly nonlinear. We can only roughly judge whether the battery is full or almost empty according to its voltage. The Gravity I2C 3.7V Lithium Battery Fuel Gauge employs Gravity I2C interface, ultra-low operating current, and real-time tracking of the relative state of charge (SOC) of the battery through Maxim’s patented algorithm, eliminating the need for full-to-empty relearning and offset accumulation errors. Plug and play to accurately measure the voltage and remaining power of the battery. The module also features as a low battery power alert interrupt function. When the battery power falls below specified threshold, the ALR pin generates a falling pulse to trigger the external interrupt of the controller.
Input Voltage (VCC): 3.3V~6.0V
Battery Input Voltage (BAT IN): 2.5V~4.2V
Battery Type(BAT IN): 3.7V Li-polymer/Li-ion battery
Operating Current: 50 uA
Interface: Gravity I2C (logic level: 0-3.3V)
Dimension: 22.0*30.0mm/0.86*1.18 inches