I saw these super budget motors, and figured they might be similar to the $2 1104 motors used in the BabyApe (flyable buyt non-standard mounts). It comes with a 3-hole base and foldable 5" prop held on by M2 screws, but it also has a 2mm shaft so should fit props for FPVcycle motors. 1503s have similar stator volume to a 1205, so maybe for a 3" build?
https://www.aliexpress.us/item/3256805182582279.html



At $20 a set it seemed a little pricey (the 1104s are like $2) and reading the description carefully these motors are sold as used, meaning they were likely pulled off a batch of non-functioning drones. Well you know the $20 camera drones that are being promoted everywhere, well now some of them come with brushless motors, and they look awfully similar. So I figured I would just pick one up and pull those motors off. Plus get the included batteries and spare props.
There are probably hundreds of brands/models and my guess is most of the internals are probably the same, this is the one I got for $25 and came with 3 batteries. The specs specifically state 1503-4000kv motors.
https://www.aliexpress.us/item/3256805946891739.html



I received the drone, half expecting to get some garbage toy, but was surprised that this was actually a good value and flew decent LOS, of course not without its issues.

It comes with a dual 4k wifi camera that has a whole bunch of smart functions if you install an app. I expect you would be seriously disappointed if you buy this for the camera, I didn't even bother to try that. There are plenty reviews online if you want to get an idea what it offers. Fortunately the camera module detaches easily with one screw and a plug. The drone flies normally using the controller without the phone or camera.



Some notes flying it briefly LOS at close range.
- One button take off/landing works well with decent altitude hold. The throttle stick is self centering and up/down to control altitude.
- Remote is llke a Mavic clone, but is decent and controls the drone well enough
- Motors startup with the BLHeli boot tones. Flies smoothly and 1S 1800mah batteries seem to give decent flight times
- Like most toy drones, hover tends to drift around, but can be corrected with the adjustment button. Headless mode is hit and miss. Obstacle detection is a joke, as soon as I turned it on, it found the nearest wall and crashed into it, low voltage alarm sounds too early (pack still measured 3.9v) but  it continues to fly afterwards.
- Nice foldable arms (also fold in in a crash) and soft paper thin props just crack and probably not cause much damage.
- Individual arm leds plus front/rear LEDs.

And the internals. Everything plugs into the FC. Motors/LEDs/Sensor/Camera.


The 1S 1800mah batteries have a snap together plastic shell and their own charging board with micro USB plug. The battery slots in easily and the drone has a nice power button, actually kind of like that compared with our usual XT30/PH2.0 plugs.


I was expecting the FC to look a little like a whoop AIO board, but it was so empty?!? Wait a second where are the mosfets and ESC MCUs? How can they run BLHeli on such a bare board?


And the main MCU has no markings. No STM chips here it seems...


Ok, then I remembered the arms were encased, and those 4-wires probably were not the 3 motor wires plus LED. Alright it has individual arm ESCs with the led on the board as well.


Don't recognize any of these chips. So are our hobby grade ESCs with their 32bit processors over engineered and over priced? Maybe 1S motors are just a lot simpler to drive?
The ESC has a 4-wire connector labelled L-M-G-V, maybe Led, Motor, Gnd, Vbat? Wonder if it takes PWM signal?



I was originally planning to try these motors with a 1-2S AIO and maybe some 3" props, but might put a FPV camera on this drone first and see how it flies.