Quote:
Originally Posted by vidjoman
Many years ago I had a small JVC video camera which used 3.6 volt Lithium Iron batteries and came with a warning that used in low temperatures the batteries will have a reduced performance. It suggested that you use 2 batteries and keep one warmed under your armpit.
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I think the batteries are "lithium-ion" rather than "iron". According to an RI Christmas Lecture series that I watched some years ago, lithium-ion batteries can be quite small because lithium itself is a light (in terms of atomic weight) metal and its ions are therefore small.
Colin.