These motors have a kv rating, kv meaning how many rpms the motor does per 1volt. They also have a S or voltage rating and max amps. They go way deeper best to google.
The batteries are usually lipo and are rated 3.7v a cell,flat voltage. So 1S is 1cell 3.7volts(4.2v charged), 2S is 7.4v(8,4v), 3S is 11.1v(12.6v) and so on. They also have mah capacity and a C rating for discharge current.
https://www.google.com/aclk?sa=l&ai=...WgQ0Qx6BAgDEAE