The engine that powers the growth in batteries, especially primary and small rechargeable varieties, has been, and will continue to be, the proliferation of portable electronic devices that find use in our daily lives. The worldwide battery market in 1997 was about $34 billion of which the primary market segment was about $10 billion. The growth in primary batteries has closely followed the increased use of “boom” boxes, Walkman portable cassette and disc players, and the like.
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Ralph J. Brodd (1999) studied this question.