This is the current cheap toy drone from best buy, $35 USD. 20250502_101345.heic is a picture of the underside of the drone with the bottom removed. The screwdriver that came with the drone was sufficient for doing this. First the battery should be removed with its captive screw, then the 20 or so machine screws around the rotors and the 4 self-tapping screws along the main body.
The 4 holes at the far diagonal corners were used for pressure fit plastic and rather than screws. Similarly the largest white posts closest to the mainboard appeared unused. The large connector at the top is for a programmable LED strip that snakes around the entire outside of the body for decorative coloring and user signaling. The four sensors that are presumably for obstacle avoidance can be seen in each of the 4 directions as black housings with thin positive and negative wires coming from them. There are two downward facing vertical sensors apparent here. The shorter one on the top connected straight to the mainboard has a round window in the bottom cover, whereas the taller one on the bottom has an extruded-like rectangular channel that protects it as it sticks out below about as far as the battery case. The battery connector is free on the right with its thicker wires. This cable originally snaked into the backside of the battery case through an opening. There is also a rectangular opening adjacent to the battery case (neither shown) that appears unused and could work for connecting an external battery except it is just a little smaller than this plug is. It appears otherwise unused. Cabling is secured with small amounts of hotglue which leaves strands of hotglue spread across the inside of the body. The mainboard is secured with two screws and has silkscreen labels across it. There is a thick insulated silver wire extending from the mainboard opposite the power connector. This could be an antenna. Two of the four roto motors have black and white wiring; the other two have red and blue wiring. Visual inspection of the mainboard at this stage of disassembly confirms that the 4 black housings for obstacle avoidance, as well as the shorter downward-facing sensor, may likely all be infrared peripherals, as there are two "IR+" labels near where the 4 red wires connect to the board. The motors connect to four pairs of M+/M- pads. The LED strip connects to a pair of L+/L- pads; 3 other L+/L- pads are unused. I might guess that the 5 2-wire IR devices are LEDs, whereas the 6th 3-wire device extending below could be an infrared photosensor, but I don't really know. One unused pad is labeled DAT. Text on the board may include "2021.07.11" and "KZXX18RX". Removing the mainboard likely means engaging the nest of soldered wires and hotglued components. If not reasonably to remove with the components attached, it might be most reasonable to disconnect all the components from the housing. This looks like the intended approach, and it might mean re-applying little dabs of hotglue to keep everything in place on reassembly. I don't immediately see an obvious microcontroller on the underside of this board. It is apparent that the antenna and power connector are likely soldered onto the unviewed side. It could make sense to consult FCC photos before continuing.
