C Industrial Battery is designed for everyday devices that require a heavier current or continuous use. There are many similar sized, carbon zinc batteries but the size C alkaline provides four to nine times more energy. These batteries are heavy-duty and they are economical while still providing a high rate source of portable power. Energizer industrial batteries make a difference in power source. Some of the commercial applications that you will find these alkaline batteries are: Telemetry, Blood Glucose Monitor, Blood Pressure/Pulse Monitor, External Infusion Pumps, Pulse Oximeter, Portable Communications, Cameras, Audio Devices, High-Powered Flashlights, Pagers, TV Remote Controls, and Electronic Door locks.