Does the DJI Matrice 400 battery support self-heating?

Yes. When used with the charging case, if the TB100 battery temperature is below 5°C, plug into the battery case and turn on the power, and the battery will automatically heat up first.

When the battery temperature exceeds 20°C, it exits self-heating and begins charging.

When used with the aircraft, if the battery temperature is below 20°C, plug into the aircraft, the battery will automatically start heating to 20°C, then stop heating and enter the insulation mode.