We supply Energizer or other high quality alkaline batteries for best performance in Klima Launch Controllers. Klima controllers will even take TWO batteries for extra oomph. These batteries are also excellent in the earlier Estes orange launch controllers.
CAUTION: European Duracall PP3 9V batteries and some others do NOT work in this launch controller or the earlier Estes launch controllers. They are designed for long life not instant power.
Save them for your smoke alarm!