Question: are dry cells allowed on flights?
Answer: Batteries Allowed in Carry-on Bags: Dry cell alkaline batteries; typical AA, AAA, C, D, 9-volt, button sized cells, etc. Dry cell rechargeable batteries such as Nickel Metal Hydride (NiMH) and Nickel Cadmium (NiCad). ... Most consumer lithium ion batteries are below this size.