The coulomb (symbol: C) is the International System of Units (SI) unit of electric charge. It is the charge (symbol: Q or q) transported by a constant current of one ampere in one second:1C=1A1s. A Coulomb Counter is a device to measure the current that your devices or sensors are using.

The Grove Coulomb Counter 3.3V to 5V (LTC2941) is based on LTC2941, its operating range is perfectly suited for single-cell Li-Ion batteries. A precision coulomb counter integrates current through a sense resistor between the battery's positive terminal and the load or charger. This module measures the number of amp-hours has been used, if you use a fully charged battery, you can test the amount of battery you have used, the remaining percentage, just like the remaining battery shown in your phone. Vice versa, if you are changing a battery, you can use this module to monitor the charging process.

Getting started with SeeedStudio Grove Coulomb Counter 3.3V to 5V (LTC2941)

Features:

1. Indicates Accumulated Battery Charge and Discharge
2. High Accuracy Analog Integration
3. 1% Charge Accuracy
4. SMBus/I2C Interface

Application:

1. Low Power Handheld Products
2. Cellular Phones
3. MP3 Player
4. Cameras
5. GPS

Specification:

1. Operating Voltage 2.7V to 5.5V
2. Operating Temperature 0 to +70
3. Accuracy 2ppm from 0C to +40C
4. Interface I2C
5. I2C Address 0x64

Package Includes :

1 x SeeedStudio Grove Coulomb Counter 3.3V to 5V Module (LTC2941)
1 x JST cable