XPost: uk.rec.driving, alt.home.repair, uk.d-i-y   
   From: CFKinsey@military.org.jp   
      
   On Sun, 23 Jun 2019 03:07:05 +0100, Xeno  wrote:   
      
   > On 23/6/19 2:03 am, TMS320 wrote:   
   >> On 21/06/2019 21:19, Commander Kinsey wrote:   
   >>> How does a lead acid battery charger (or car alternator) know when to   
   >>> switch to trickle charge?   
   >>   
   >> It doesn't.   
   >>   
   >>> 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?   
   >>   
   >> Ohm's law.   
   >   
   > That's a bit *deep* for some people to comprehend.   
      
   It's also impossible to use it without having a remote (to the alternator)   
   sensor.  It's like my power company telling me if I'm using a kettle or a   
   toaster.   
      
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