batteries  may  not  harm  a  human  or, 
 through  inaction, allow a  human  being 
             to come to harm.             
 a battery must obey the orders given  it 
 by  human  beings  except   where   such 
 orders  conflict  with  the  first  law. 
 a   battery   must   protect   its   own 
 existence as  long  as  such  protection 
 does  not  conflict  with  the  first or 
               second laws.               
  these things power almost everything,   
 but  when  i  speak  about  batteries  i 
   speak about standard household ones.   
        think double a, triple a,         
    twentyfive twenty, nine volt, such    
 they  look  slick  but  are  very  dirty