2/10

I tried charging and discharging the capacitor

Charge the capacitor by connecting it to the battery with the correct polarity

Since I am afraid of the capacitor exploding, I only charge 4700μF at 0.02A for 3 minutes. I want to charge it with 1A

Leave it in this state for three minutes ...

If you connect the LED of the capacitor to the LED after charging

It keeps light for about 10 minutes. It gets darker and faster.

Also put the circuit diagram (written in LTspice)

Charging circuit (* blows up if wrong pole is used)

Circuit that illuminates LED