Yes. Fuel cartridges at cold temperatures may lose the required propellant pressure. Bring the tool, fuel cartridge and batteries above 10°F (-12°C) by placing the tool in a heated building or vehicle. Fuel cartridges may also be sufficiently warmed up by enclosing them in your hands or placing them inside your pant pockets for a short period of time. Never expose the tool, fuel cartridge or battery to flame.