There are videos on YouTube that show how to open it, etc... what I want to emphasize is the following:
a) If any of the lights on the right and left do not work, it is because they are not charged, plug in the USB cable, the light will be red and when it is charged it will stop being red, charge both sides... at least 2 hours.
b) The same USB charging cable is used for the main part that performs the rotational movement, charge it in the same way by applying the cable into the special slot.
c) The remote control, the button that is detachable on the stick takes a size 16/32 3-volt battery which is quite decent, it doesn't "die" easily and you can find it in stores with such items or online.
That's it, happy shooting...!