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A battery is the electrochemical cell is used as an energy source in a flashlight.
A charger is typically used to restore energy to an otherwise spent energy source. In the case of a "rechargeable battery" chargers are used to replace spent energy in the battery allowing it to be used again.
A source of energy
The alternator charges the battery.
The alternator charges the battery.
A battery is a chemical source of energy that produces direct current, DC. Some are rechargeable; some are not.
Yes, battery is a electrical source.
solar battery
There is a battery
battery
Battery
Sonar uses electricity, so the source of energy is either a generator or a battery.