Energizer Industrial D batteries are the exact same batteries offered to consumers (with the silver labels) except they are specially priced for government and commercial buyers.

-Most popular long-lasting power source
-Very good shelf-life: up to 10 years at 21°C
-Lower initial cost compared to Lithium and NiMH Rechargeable battery systems
-Suitable for use across all types of devices
-72 D Batteries
-1.5 Volts