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
Centre for Fire, Explosive and Environment Safety processing and storage dumps and the design, testing and evaluation of safe explosive storage houses. Additionally, it trains armed forces personnel and DRDO scientists in the safe use of explosives and ordnance, and enforces compliance of safety rules. Simulation and risk modeling is also carried out, in order to aid in Disaster Management. Environment Safety - CFEES develops treatment and disposal techniques for hazardous Heavy Metal Wastes, as well as Photodegradable Polyethylene for use as packaging material at high altitudes, which prevents the pollution in mountainous areas where the Indian Army operates, such as Kargil and Siachen. CFEES also plays