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<p>such and require separate disposal. The energy needed to manufacture a battery is about 50 times greater than the energy it contains. Due to their high pollutant content compared to their small energy content, the primary battery is considered a wasteful, environmentally unfriendly technology. Due mainly to increasing sales of <a href="page.php?w=wireless_device">wireless device</a>s and <a href="page.php?w=cordless">cordless tools</a> which cannot be economically powered by primary batteries and come with integral rechargeable batteries, the</p><p>
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