XPost: alt.home.repair, sci.electronics.repair   
   From: rod.speed.aaa@gmail.com   
      
   On Fri, 20 Jan 2023 08:28:30 +1100, Mighty✅ Wannabe✅ <.> wrote:   
      
   > Rod Speed wrote on 1/19/2023 3:41 PM:   
   >> David Lesher  wrote   
   >>   
   >>> You want the spark when disconnecting to be AWAY from the   
   >>> rapidly charging battery.   
   >>   
   >> There is no hydrogen when the once flat battery   
   >> is being charged once the engine has started.   
   >>   
   >>> So: Run the negative from frame to frame,   
   >>> and disconnect at the rescue car first.   
   >   
   >   
   > I real life scenario there is no danger of hydrogen accumulation under   
   > the hood because it is too airy inside the engine compartment.   
      
   In spades when the hood is opened to allow the positive jumper lead   
   to be connected to the battery post.   
      
   > There will be danger of hydrogen accumulation if the lead-acid battery   
   > is confined inside a box, like underneath a motorized wheelchair.   
      
   Not with modern sealed batterys which have a catalyst that recombines   
   the gases back to water and which have the metal used in the plates   
   which ensure that no hydrogen is produced when they are charged.   
      
   --- SoupGate-Win32 v1.05   
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