Today’s battery technology is based on chemistries that can only power devices for a few years at best. This is due to the small power densities of these batteries as well as the dependence of the battery's capacity on environmental conditions such as temperature and humidity. City Labs is developing a Tritium Battery with a lifetime of over 20 years that can power a range of devices where battery replacement is difficult or impossible.

City Labs’ battery life is immune to varying temperatures and other environmental conditions due to the fact that it is based on the decay of Tritium, a radioisotope used as an illumination source for Exit signs commonly found in schools, theatres, commercial buildings and aircraft.