Nine-volt battery batteries were formerly made in this size. They had higher capacity than the then-standard carbon-zinc types, a nominal voltage of 8.4 volts, and very stable voltage. Once used in photographic and measuring instruments or long-life applications, they are no longer manufactured as mercury is highly toxic and accumulates in the ecosystem, posing a risk to humans and wildlife. Most battery voltage testers and chargers that can also test nine-volt need another snap clip to hold the battery, while cylindrical batteries often share a holder that may be adjustable in size. Because of the proximity of the positive and negative terminals
Toxic tort and residents. Thousands of toxic chemicals are used in industry and workers in these areas can experience a variety of toxic injuries. Unlike the general population, which is exposed to trace amounts of thousands of different chemicals in the environment, industrial workers may be regularly exposed to much higher levels of chemicals and therefore have a greater risk of developing disease from particular chemical exposures than the general population. An occupational toxic injury case may result in a workers' compensation claim, which is made against the worker's employer. The same injury can potentially support a toxic tort case against "third