From: clsnowyowl@gmail.com   
      
   On Friday, March 17, 2023 at 2:13:50 PM UTC-5, vjp...@at.biost   
   ategist.dot.dot.com wrote:   
   > In <07c6dfdb-88a5-4441...@googlegroups.com> by Peter W.  on Fri, 17 Mar 2023 10:23:27 we perused:    
   > *+-> I have an hp2621a terminal which had a battery to keep nonvolatile   
   settings    
   > *+-> (eg baud rate, parity &c). I want a chargeable battery to keep those   
   settings    
   > *+-> going but to charge when I have the machine on.    
   >    
   > *+-The issue that comes to mind is whether a/the power-supply would cause   
   problems if connected to the terminal with or without the battery. If not,   
   would an appropriate Zener diode do the trick?    
   >    
   > Thanks..    
   >    
   > THough I also realise I could get two batteries, use one, charge the other..    
   >    
   > But I suspect it will not fit exactly so I need to solder it   
   > --    
   > Vasos Panagiotopoulos panix.com/~vjp2/vasos.htm    
   > ---{Nothing herein constitutes advice. Everything fully disclaimed.}---   
      
   Just another point, although it is basic- Be extremely careful when you do   
   solder!    
   HEAT from any source including soldering can create adverse conditions or   
   effects. If you have multiple batteries, gang them in a wrap with the contact   
   points   
   exposed at either end (if the batteries are stacked) in order to minimize the   
   points   
   at which you solder. Also, solder momentarily in a relative sense. That way,   
   you   
   minimize contact time, still perform the task, and get an effective connection   
   that   
   will adhere in the process. Whatever you do, be extremely aware and be very   
   careful. There is some risk involved in doing this and wear eye protection.   
      
   Best wishes.   
      
      
   Charles Lucas   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)