The Hornet air horn has a rechargeable Lithium-Ion battery that will retain up to 90% of its charge even after a year in storage at room temperature. With prolonged exposure to cold temperatures, it can lose as much as 30% of its charge but it will still operate normally. Simply recharge it to get it back to full battery capacity.
Disposable gas air horns, on the other hand, are notorious for leaking during prolonged storage, often making them completely unusable, and they will not work well or at all in cold temperatures.
