battery is the source of electrical energy for battery-operated device
battery is not electrical_device. flashlight is battery_powered_device. battery is electrical_component. battery_recharger is electrical_device. battery_electric_vehicle is new_energy_vehicle. battery_recharger is not electrical_device. battery is electrical_device. battery_powered_device is not electrical_device. battery_powered_device is electrical_device. battery is device_stores_energy_chemically.