The DJI Matrice 400 TB100C Tethered Battery extends the TB100's 20,254 mAh and 977 Wh capacity with dedicated ports for third-party tether systems and docks, enabling unlimited flight times for persistent operations like aerial relays or lighting. Self-heating and rated for 400 cycles, it integrates seamlessly with approved tethered power stations for continuous power in dock or tethered modes.