VARTA Longlife C
VARTA Longlife C is a standard C alkaline battery, also known as LR14. It is a 1.5 V primary battery used in equipment that requires stable power without recharging.
It is a size many are familiar with from, among other things, larger flashlights and other equipment with moderate power consumption. Here, it is primarily the battery's physical format and long shelf life that make it relevant. VARTA specifies a guaranteed shelf life of 10 years, making it ideal as a storage battery for places where you want to have spare batteries ready.
As it is an alkaline battery with primary chemistry, it is intended for single use and not for recharging. This type is typically a good fit when you want a simple and reliable power source for professional equipment or standard appliances where battery replacement is easier than recharging.