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1) Zinc-carbon cells (primary batteries)2) Alkaline cells (primary batteries)
3) Silver oxide cells (primary batteries)
4) Mercury cells (primary batteries)
5) Lithium cells (primary batteries)
6) Zinc-air cells (primary batteries)
7) Lead-acid cells (rechargeable batteries)
8) Nickel-cadmium cells (rechargeable batteries)
9) Nickel-metal hydride cells (rechargeable cells)
NiMH batteries have been substituting NiCd batteries more and more often. They are more environmentally friendly as they do not contain harmful cadmium. They have a higher energy density in comparison to NiCd batteries, which means that they have a larger capacity but shorter life and faster self discharge. The cathode is made from nickel and the anode is a special alloy of metals such as nickel, manganese, cobalt, alluminium and magnesium. The electrolyte is potassium hydroxide (KOH)
USAGE: portable equipment which requires high energy consumption: mobile phones, video cameras, digital cameras, emergency lighting, electronic tools, laptops, etc…
