Yes. A generator is another temporary source, but it can usually be used more than once, so a battery would be the best choice.
A battery.
A temporary source of an electric current is called a battery. It converts chemical energy into electrical energy to power devices or circuits.
A battery is a common temporary source of electric current. When connected to a circuit, a battery transforms stored chemical energy into electrical energy to power devices or equipment. Once the stored energy is depleted, the battery needs to be recharged or replaced to continue providing electric current.
An electric current is movement of electrons, no matter the source or cause.
A generator can be used as a temporary source of power
Either the cell e.g. a battery, if one is included in the circuit. Or a generator such as a dynamo
A cordless toothbrush, a battery operated electric clock and an electric flash light could be in this group of house hold items.
Battery
A potential difference in an electric circuit is created by a voltage source, such as a battery or a power supply. This causes electrons to flow from higher potential to lower potential, creating an electric current in the circuit.
Battery
There is a battery
turn it off by unplugging the current source.