I got led off eBay. See photo in this trail. They are designed to plug into usb socket.Awesome! I had a couple of lighting prototypes but I like yours much better! Can you leave them plugged in when you change batteries? (hot plug it) Where did you get the led lights? 4-5v?? Thanks!
Please see photos in this thread above, all that is needed is the usb leds and an OTG Male micro usb to female usb and a clear Tello top cover.