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Advanced lithium batteries are ideal for harsh environments because they can operate in extreme temperatures and have the highest energy per unit weight and highest energy per unit density out of all battery chemistries.
Lithium thionyl chloride batteries come either in spiral wound cells or bobbin-type cells, with spiral bound having high current pulse capability – resulting in higher current draw and higher self-discharge; and bobbin-type having higher energy density, higher capacity, a wider temperature range and longer lifetime.