External Battery Extender. Features: The Osmo external battery extender is designed to prolong the operating time of the Osmo by connecting to external power sources such as a dedicated DJI charger or Intelligent Battery. It is ideal for using the Osmo in extended period operations such as timelapse. If using a DJI Intelligent Battery as the power supply, a Battery (10 PIN-A or 2 PIN) to DC Power Cable is required and can be purchased separately.