depending on the igniter (see Robert Briody’s great article on Electrical Current Requirements of Model Rocket Igniters). For the Estes igniter, the manufacturer says that the batteries need to put out at least 500 milliamps at 6 V. Alkaline, NiZn, and NiMH AA cells are all acceptable, ...
powder, or non-detonable rocket propellant and designed as single-use motors or as reload kits, as well as commercially manufactured black powder in quantities not to exceed two pounds, safety and pyrotechnic fuses, quick and slow matches, electric matches and igniters when used inmodel rocket...