Adafruit Single Li-Ion and LiPoly Battery Power Meter

This small, palm-sized battery power meter features a compact display that accurately shows the remaining charge in your single Lithium Ion or Polymer rechargeable battery. The colorful display provides four levels of power indication: 100%, 75%, 50%, and 25%. When the power level drops below 25%, a red battery frame is illuminated as a warning.

Designed with straightforward functionality, it performs basic voltage comparisons to ensure you know when it's time to recharge. However, be aware that it will consume a small amount of battery life while connected. It's an excellent choice for those needing an uncomplicated method to verify charge levels in single 3.7V or 4.2V batteries.

The power meter comes equipped with two bare wire ends; simply connect the black wire to ground and the red wire to positive. Always verify battery polarity, especially if using connectors not supplied by Adafruit. Note that the PCB might come in either green or blue, adding a slight variance in appearance. Please note that the battery is not included with the meter.