Seeed Studio (101020593) Coulomb Counter Board, 3.3V to 5V, Arduino Board

Grove - Coulomb Counter 3.3V to 5V (LTC2941) is based on LTC2941, its operatingrange is perfectly suited for single-cell Li-Ion batteries. A precision coulombcounter integrates current through a sense resistor between the battery'spositive terminal and the load or charger. This module measures the amount ofamp-hours have been used, if you use a fully charged battery, you can test theamount of battery you have used, the remaining percentage, just like theremaining battery shown in your phone. Vice versa, if you are charging abattery, you can use this module to monitor the charging process.Features:- Indicates accumulated battery charge and discharge- High accuracy analogue integration- 1% charge accuracy- SMbus/I2C interface- Accessory Type: Coulomb Counter Board- For Use With: Arduino Board