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
Bomb disposal conventional munitions on operations, as well as battle area clearance and High Risk Search in support of improvised explosive device disposal. Royal Engineers providing search advice and assets and Ammunition Technicians and Ammunition Technical Officers of 11 EOD Regiment RLC Royal Logistic Corps providing Improvised Explosive Device Disposal (IEDD), Conventional Munitions Disposal (CMD) and Biological, Chemical Munitions Disposal (BCMD). They also provide expertise in Advanced IEDD and in the investigation of accidents and incidents involving ammunition and explosives, where they are seen as Subject Matter Experts (SMEs). Weapons Intelligence is supplied by Royal Military Police, Intelligence Corps and Ammunition Technical