I've build a snap on accessory for a DJI Mini 2 drone for a RAK meshtastic board. This includes a battery tray for a 1800mAh battery - https://a.co/d/hjQWfcA
Securing the battery inside the tray will be left to you, it's just snug enough hold the battery in, but if you're flying the drone like an X-Wing fighter, you may want to add some something to keep it tight.
I used M3 heated screw inserts to secure the board to the mount.
Here is the antenna I used - https://a.co/d/0Kv3Dv3
I printed it sitting upright, and used organic supports to support the top tray edge, I didn't put support in where the battery slides in and it printed just fine.
Have fun! And please leave feedback if you do print it, it helps me fine tune designs like this.
The author marked this model as their own original creation.