Memorex Brand Batteries - Size C - Zinc Chloride type - 4 PackThese Memorex-brand batteries are great value-for-money, and best suited for low-to-medium power devices, such as wall clocks. These are zinc chloride batteries. For higher-powered devices, we recommend using alkaline batteries instead.Please note that these batteries are not suitable for use in digital cameras, as they do not have a high-enough power output. (Digital camera owners should buy single-use Lithium batteries, NiCd rechargables or NiMH rechargables).These are Size "C" batteries- the smaller of the two "short fat" battery types.