The ‘Extreme Everest’ expedition has recently completed its groundbreaking expedition to the summit of Everest to research the effects of low oxygen on the body. Exide Technologies provided the batteries used in the 4 laboratories – the highest of which was at 7,900m asl (above sea level). The Sonnenschein ‘Dryfit’ batteries can be used up to 10,000m elevation and in temperatures down to – 40oC. They have extremely low emissions and no acid vapours are released, unlike conventional lead acid batteries.
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PMI falls as manufacturers feel the squeeze
17 months or two and a half years - which is it?