This is a 100µF electrolytic capacitor that can only be operated up to a voltage of 25 volts. With this electrolytic capacitor, pay attention to the anode (+). This may only be connected directly or indirectly to the positive connection (+) of the power supply (9V). It can store hundreds of thousands of times more energy than the 1nF variant. A charging voltage of 1V is achieved after just 100 µs if the charging current is 1A.