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 injury Toxic injury A toxic injury is a type of injury caused by toxin. Toxic injuries can cause teratogenic effects, respiratory effects, gastrointestinal effects, cardiovascular effects, hepatic effects, renal effects and neurological effects. They can also lead to various forms of cancer or learning disability. Effects can occur after acute (short-term) or chronic (long-term) exposure, depending on the toxicity of the substance. Those who suffer from Multiple Chemical Sensitivity are at greater risk of toxic injury. In America, May is recognized as Multiple Chemical Sensitivity and Toxic Injury Awareness Month. Every toxic injury or expsoure to a toxin has different effects