XPost: uk.rec.driving, alt.home.repair, uk.d-i-y   
   From: rod.speed.aaa@gmail.com   
      
   Commander Kinsey  wrote   
      
   > How does a lead acid battery charger (or car alternator) know when to   
   > switch to trickle charge?   
      
   From the current the battery takes.   
      
   > I can understand it noticing a drop in charging current if the battery is   
   > on its own, but what if a random changing load is connected, as there is   
   > in a running car?   
      
   You just look at the current going to the battery. The variably   
   loads like with lights isnt supplied by the battery when the   
   engine is running, its supplied by the alternator.   
      
   --- SoupGate-Win32 v1.05   
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