Recharge: Troops May Become Their Own BatteriesIf 120-degree summer heat and 70-pound packs weren't enough to handle, American troops in Iraq are getting sapped of energy by a surprising source ? their own batteries. Now the race is on to lighten the extra 30-pound load they carry in combat.<img src="http://feeds.feedburner.com/~r/foxnews/scitech/~4/332836361" height="1" width="1"/>
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