AIO's power supply to DJI air unit is broken. Can I supply power directly from battery 4s with a safe flight?

[Ekaterina]

Hi, I have a question about AIO.

AIO's power supply to airunit is broken somehow. In other words, every other wirings are fine like motors, transmitters, buzzer, LED. Even Airunit's RX-TX wires seem to work by an electric inspector.
In fact, I tested to connect 4s battery to airunit directly without AIO board and DJI goggles shows vision well.
Then, how dangerous/safe to fly it with the direct wiring like the screen capture? I am afraid airunit could be burned or the AIO might catch smoke/fire during flight, But because battery is 4s, I hope to fly the drone well.

 

[SpeedBump]

Here are the specs for the Air Unit

According to the input power, it will take up to 17.6 volts , but I would still recommend adding a capacitor direct on the VBAT connections to prevent any unwanted voltage spikes. Therefor, you are good to go with 4S and smaller, but I would not use anything more than a 4S.

DJI FPV Air Unit​

Weight	Air Unit (Camera included): 45.8 g 3.9 g (MMCX elbow antenna each)
Dimensions	Air Unit: 44×37.8×14.4 mm Camera: 27.4×21.1×20.1 mm Coaxial Cable: 100 mm
Operating Frequency	5.725-5.850 GHz
Transmitter Power (EIRP)	FCC/SRRC/MIC: <30 dBm; CE: <14 dBm
Min. Latency (end-to-end)	Low Latency Mode (720p/120fps): <28 ms High-Quality Mode (720p/60fps): <40 ms
Max. Transmission Distance	FCC/SRRC: <4 km; CE: <0.7 km; MIC: <2.5km
Video Format	MP4 (Video format: H.264; Audio format: ACC-LC)
I/O Interface	USB-C, MMCX, 3-in-1 port, microSD card slot
Supported Flight Control System	The DJI FPV Air Unit is only compatible with flight controllers that support Betaflight
Operating Temperature Range	32° to 104°F (0° to 40°C)
Input Power	7.4-17.6 V, about 4-9 W
Channels	8
Channels info	FCC Channel 1: 5660 Channel 2: 5695 Channel 3: 5735 Channel 4: 5770 Channel 5: 5805 Channel 6: 5878 Channel 7: 5914 Channel 8: 5839 CE/SRRC Channel 1: 5735 Channel 2: 5770 Channel 3: 5805 Channel 8: 5839 MIC Channel 1: 5660 Channel 2: 5700 Channel 8: 5745

 

[Ekaterina]

Thanks, SpeedBump. Yes, that's true, and I was afraid about spikes of current and voltage. My solution is to insert secondary ceramic capacitor right before airunit. Hopefully Airunit won't get unexpecting power.