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Nickel cadmium cell (NiCd)
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The active components of a rechargeable NiCd battery in the charged state consist of nickel hydroxide (NiOOH) in the positive electrode and cadmium (Cd) in the negative electrode. For the electrolyte, usually caustic potash solution is used. (read more...)
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Lithium ion cell (LiIon)
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Nickel metal hydride cell (NiMH)
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(c) fotolia.com
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The active components of a rechargeable NiMH battery in the charged state consist of nickel hydroxide (NiOOH) in the positive electrode and a hydrogen storing metal alloy (MH) in the negative electrode as well as an alkaline electrolyte. (read more...)
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Lead acid cell (Pb acid)
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Lead acid is used in certain specialist applications such as outdoor garden products. Characteristics include their high weight, relatively short shelf life without recharge but a good ability to deliver high currents. Other characteristics of lead acid are:
1. Ideal scenario is for uses requiring (occasional) high current draw, and where charging is regular (i.e. automotive).
2. High weight/energy storage capacity.
3. Low cost/energy storage capacity.
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Lithium polymer cell (Li polymer)
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Lithium polymer cells are based on a similar chemical structure as LiIon cells. The difference is that the electrolyte consists of a gel and that the housing consists of an aluminium foil or metallized plastic foils. Theoretically there are no restrictions as to their shape.
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