It's the other way around, the battery powers the flashlight.
There's no set answer to that. It depends on the capacity of the battery and the power consumption of the flaslight.
In a battery-powered flashlight, chemical energy stored in the battery is converted into electrical energy when the battery generates a current. The electrical energy is then converted into light energy when the current passes through the light bulb or LED, producing light.
The conversion is from chemical energy to electricity to light energy.
The energy conversion in a battery powered flashlight comes from the battery itself. Batteries use metal electrodes set into a chemical paste to store electricity; as the electrode oxidizes it releases electrons.
When a battery-powered flashlight is switched on, chemical energy stored in the battery is transformed into electrical energy, which then powers the light bulb to produce light. This process involves the conversion of stored energy into usable light energy.
The popular energy of flashlight are Rechargeable Li-on battery, Alkaline battery.
Potential energy
A flashlight battery stores chemical energy. When the battery is connected in a circuit, this chemical energy is converted into electrical energy, which powers the flashlight. The flow of this electrical energy energizes the light bulb or LED, producing light.
Energy in a flashlight changes from stored chemical energy in the battery to electrical energy when the battery powers the light bulb, which then converts electrical energy into light and heat energy.
When a battery-operated flashlight is turned on, the chemical energy stored in the battery is converted into electrical energy, which powers the light bulb, producing light energy and heat energy.
potential energy
A flashlight battery contains stored chemical potential energy that is converted into electrical energy when the flashlight is turned on. This electrical energy is then used to produce light energy, which is a form of radiant energy.
flashlight: the battery in the flashlight transforms it's chemical stored Energy into electrical Energy which is then transformed into radiant energy because of the light the flashlight gives off.