![Whenyouthinkofbatteries,you'lllikelythinkaboutthempower...]( "Whenyouthinkofbatteries,you'lllikelythinkaboutthempower...")
- 問題詳情：Whenyouthinkofbatteries,you'lllikelythinkaboutthempoweringupremotecontrols,cellphones,flashlightsandtoys.Butsomepeoplecarryabatteryaroundintheirbodytopowerapacemaker(起搏器).Itisn'treallypleasantandeasytocarrybatteriesbecausetheyneedtoberep...
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