What are the power requirements of the SNES Classic?
Solution 1:
As mentioned on arstechnica
Even though the Super NES Classic Edition is rated for five watts, it only draws 2.3W from the provided USB adapter. The USB Micro power cord can be plugged in to any sufficiently powerful source, including a laptop or the USB power outputs on many modern TVs.
This basically means that you do not need to buy the official charger and most, if not any charger would work.