Nickel cadmium batteries are designed for powering appliances, alarms, exit signs, emergency lights, and similar applications. As an alternative to alkaline batteries, nickel cadmium batteries last much longer, making them ideal for use in high drain devices. These batteries are rechargeable, and can operate up to 20 hours or longer depending on use before recharging.
Lightbulb Wholesaler's model LBW3AA-3.6V exit / emergency battery operates off 3.6V and is sold in multiples of 1. It comes with a standard manufacturer's warranty, and its UPC is 372036360084.