DJI drone battery

[Alex Fraser]

I forgot this link, which explains more.
https://hackaday.io/project/188194-dji-fpv-battery-breakout-mod-2-communication
<https://hackaday.io/project/188194-dji-fpv-battery-breakout-mod-2-communication>
On 5/23/2025 4:51 PM, Alex Fraser via Tacos wrote:
> I mostly like the DJI batteries in my Phantom 3s.  They snap into the 
> drone body and you can turn the power on and off with a button 
> sequence. They can be set to auto discharge which is a great safety 
> feature. The batteries communicate with the drones main controller 
> board and hence the battery charge is shown on your tablet on the 
> ground which you view the camera feed on.   It all works well enough.  
> So what's the problem?
>
> DJI is highly proprietary.  The protocol the battery circuit board 
> uses to communicate with the main board don't follow any standards, 
> well it follows DJI standards.  This makes it so if you want to 
> replace the main controller  with a third party board the battery 
> can't talk to the new board, also you can't use third party batteries 
> on stock DJI machines.   I was hoping someone would have created some 
> code for an Arduino where it would sit between known protocols and DJI 
> protocols and would make it all just work, but that apparently isn't 
> in the cards.   It is surprisingly complex.
> https://github.com/samuelsadok/dji_protocol?tab=readme-ov-file
>
> Well it is beyond what I can figure out in any reasonable amount of 
> time (12 monkeys with type writers...).  If I put another board in one 
> of my Phantoms I will use standard batteries and add on boards to read 
> power, all readily available.  This technology stuff sure changes 
> faster and faster.
>
> -- 
>
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