DJI’s first battery-swapping dock gets drones recharged and back in the air in under 45 seconds

DJI’s Dock 4 is an automated drone dock designed to keep the Matrice 5TD operating with minimal downtime. Instead of recharging the battery inside the drone after every flight, the dock removes the depleted pack and installs a charged one. DJI is targeting emergency response and other situations where a drone must be ready quickly.

The battery swap takes less than half a minute, and DJI promises a landing-to-takeoff turnaround under 45 seconds. The dock also charges two 925-gram, 260-Wh battery packs, with each taking an estimated 27 minutes to rise from 15% to 95%. The Matrice 5TD can then use a fresh pack while another is charging.

Dock 4 is DJI’s first battery-swapping dock, though similar drone-in-a-box systems already exist elsewhere. It weighs 66 kilograms without additional equipment, uses the Dock 3’s mounting-hole pattern, and requires DJI’s O4 Ground Station. It is currently intended for markets outside the United States.

A normal recharge takes about 30 minutes, while Dock 4 promises to get the drone from landing to takeoff in under 45 seconds. At the 45-second limit, that is a 40-to-1 time difference. Because DJI says the turnaround is under 45 seconds, the real speed advantage is slightly greater than 40 times.

The comparison matters because a drone waiting beside a charger cannot perform another mission. With Dock 4, an automated mechanism replaces the depleted battery in about 25 seconds. The drone can then launch while the removed pack is recharged. Each battery takes an estimated 27 minutes to charge from 15% to 95%.

This does not make the batteries charge instantly. It shifts the waiting time away from the drone by using additional charged packs. The system therefore suits operations needing repeated launches, such as emergency response, but its speed depends on having enough packs available and charged.

For emergency response, Dock 4 is designed to keep a Matrice 5TD available between calls. DJI presents the system as a “dock-as-a-first-responder” solution for uses such as safety and rescue. Rapid battery replacement means the drone can return to the air without waiting for a normal half-hour recharge.

The Matrice 5TD combines three 50-megapixel cameras, thermal imaging, color night vision, a laser rangefinder, rotating LiDAR, mmWave radar, and six-direction vision. Its onboard AI can detect 17 object types, including cars, boats, and animals. FlightHub 2 can search video by text or image and send alerts. The drone can also carry a speaker, spotlight, or parachute.

These features support searching, observation, and public-safety monitoring, but the article does not claim a specific firefighting capability. The system remains limited by weather, battery availability, payload capacity, and its current market status. DJI partners in China are taking orders, while U.S. sale is not authorized.

Multiple battery packs solve the gap between a drone’s flight time and a battery’s recharge time. The Matrice 5TD can fly for almost an hour in forward flight, while a pack takes about 27 minutes to charge from 15% to 95%. Keeping spare packs ready allows the dock to replace a depleted pack immediately instead of waiting beside the charger.

Dock 4 charges two 925-gram, 260-Wh packs at once. DJI rates each for 400 cycles and says the packs can also provide about 4.5 hours of backup power each, in sequence. With at least two packs loaded, the dock can continue swapping batteries when grid power fails.

That outage mode keeps the swapping process running, but it does not recharge the packs. Once the available charged batteries are depleted, operations must stop or wait for grid power and recharging. The setup therefore improves continuity, but requires spare packs, charging capacity, and careful energy management.

An ordinary camera drone mainly records visible-light images. The Matrice 5TD adds sensors that reveal more information: thermal cameras show heat patterns, LiDAR measures surroundings, radar detects objects, and vision sensors cover six directions. Together, these tools help the drone observe beyond what a standard daylight image can provide.

The drone has native 1280-by-1024 thermal imaging and a higher-resolution UHR infrared mode. It includes color night vision without a spotlight and a laser rangefinder reaching 3,000 meters. DJI says its rotating LiDAR, forward and upward-and-downward mmWave radar, and vision system can detect power lines at night.

Onboard AI can identify 17 object types, such as cars, boats, and animals. FlightHub 2 can search the video feed by text or image and send alerts. These capabilities expand detection and review, but they do not mean every object is always identified; the article provides DJI’s claimed capabilities rather than independent testing.

Dock 4 can be ordered through DJI partners in China because the article reports a Chinese kit price and does not describe a comparable sales ban there. The kit includes Dock 4, the Matrice 5TD, and the O4 Ground Station. Its hardware price is 167,999 yuan, or about $25,000.

The United States is different. DJI’s specification sheet has no FCC figures, and the article says the FCC added all foreign-made drones and their critical components to its Covered List in December of the previous year. New models cannot receive FCC authorization or be sold in the United States under those conditions.

The article says the Department of War or Department of Homeland Security would need to determine that a model poses no security risk. DJI has sued the commission. A separate FCC proposal could also affect previously authorized drones with LiDAR or thermal sensors and docking stations, but no final order had appeared by October 17.

Replacing a battery is usually faster than recharging because the energy was stored earlier in a spare pack. The drone only needs the mechanical swap, rather than waiting for electricity to enter the depleted cells. Dock 4 uses this approach to reduce the landing-to-takeoff interval to under 45 seconds, compared with about 30 minutes for a normal recharge.

The trade-off is carrying and managing more hardware. Dock 4 charges two 925-gram packs at once, and each pack stores 260 Wh. Extra packs add purchase cost, storage needs, and weight, while the dock itself weighs 66 kilograms bare. Charging equipment and backup-power functions also add complexity to the installation.

Battery packs do not last forever. DJI rates these packs for 400 cycles, so repeated use eventually requires replacement. A larger pool can support more consecutive missions, but it also means more batteries may age, need charging, or sit unused. The article gives these specifications but does not state prices for individual packs.