Dry cell batteries are allowed in checked and carryon baggage. This includes Alkaline, NiCad, Nickel Metal Hydride (NiMH), Silver Oxide, and Carbon Zinc batteries similar to those used in flashlights or commonly used electronic devices.
Batteries must be protected from damage and creating sparks or a dangerous evolution of heat. If installed, the device must be protected from activation by protecting the "on/off" switch or using a trigger guard. If this is not possible, the battery or batteries must be removed and packaged to prevent short circuit.