The inventor is the Swedish scientist Waldemar Jungner, who patented the nickel-cadmium type technology in 1899. In 1990 a patent dispute arose with Edison, which Jungner lost because he did not have the same means as his opponent. Ackumulator Aktiebolaget Jungner, founded by Waldemar, was on the verge of bankruptcy, but after changing its name to Svenska Ackumulator Aktiebolaget Jungner, the company still continued its development. Today, the company founded by the developer is called SAFT AB and produces some of the best NiCd batteries in the world.

Nickel cadmium batteries are a very long-life and reliable type. There are serviceable and maintenance-free models with capacities from 5Ah up to 1500Ah. They are normally supplied as dry, electrolyte-free cans with a nominal voltage of 1.2V. Although similar in construction to lead-acid batteries, Ni-Cd batteries have a number of significant advantages in the form of stable operation at temperatures from -40°C, the ability to withstand high starting currents, and optimised models for rapid discharge. Ni-Cd batteries are resistant to deep discharge, overcharge and do not require instant recharging like the lead-acid type. They are manufactured in shockproof plastic and can withstand mechanical damage well, are not afraid of vibration, etc.

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