Battery Management

Battery choice

Connector

Charging

unsurv-offline offers a plug and play solution for off the shelf 4.2 V LiIon batteries. If you do not plan to use any addon boards there is space for a 250 - 300 mAh battery inside the provided case.

BQ25180

The choice for the battery management IC was a difficult one. Since the BQ25181 (a more common formfactor of the BQ25180) is still not available

Features

• I2C programmable charging voltage / current

• automatic power selection between USB and battery (power path)

• protection features

  • Battery undervoltage protection

  • Battery short protection

  • Battery overcurrent protection