==== Radio - MC9620 G2 ====

=== Battery pinout ===

Radio battery pinout. Pins are numbered from left to right when the contacts on battery are closer to You.

  - GND (shortened pin)
  - GND
  - Thermistor (measure resistace against GND)
  - Bat+
  - SMBus Clock (connect to bq2040 or other Gas gauge I2C chip)
  - SMBus Data (connect to bq2040 or other Gas gauge I2C chip)
  - 1-wire data line - connected to chip with unique serial number like DS2400/DS2401
  - N/C

{{:project:sdr:mc9620_g2_baterry.jpeg?200 |}}

=== Dummy battery ===

In order to replace battery or make fake one You need to connect power lines and the 1-wire chip providing unique ID. Station will turn on, report bad battery but should work.