In a message on Wednesday 12-08-15 mark lewis said to Holger Granholm:   
      
   Good morning Mark,   
      
    HG> In my case, I think that the batteries I use are actually intended for   
    HG> scooters, motor cycles, small mowing/garden machines and such, as   
    HG> starter batteries, but since their life span is 7 - 8 years in my UPS,   
    HG> they'll do   
      
   ml> i'll have to check that out... i've been using the standard gell   
   ml> filled ones with the same ratings as the originals...   
      
   That's the type I use as well, ie. gel cell batteries.   
      
   ml> at one time i did string some batteries together... worked great but   
   ml> the charging circuit took forever to recharge them...   
      
   Of course, because the charging circuit was intended to refresh only   
   the original A/h capacity.   
      
   ml> i also had to use a good heavy duty wire between them...   
      
   You always have to consider that the current drawn at 12V is tenfold the   
   current drawn from the (115V) AC mains, and therefore the wire has to be   
   thick enough to carry that current, and not to drop the voltage.   
      
   ml> the first i used was from a heavy duty extension cord... the initial   
   ml> test worked but melted the insulation off the wires...   
      
   My entire ham radio station is powered from a 12V battery with backup   
   from a 20A constant voltage power supply. The 20A rating is there to   
   handle the peak currents, when running the transceiver at full power.   
      
   In this way, I don't have to buy separate mains power supplies to every   
   set, and emergency power is constantly available.   
      
   I also own a 500 Watt PA that was only powered from the mains but the   
   tubes have gone soft, so it's now resting in a cupboard. I'm afraid to   
   order the tubes because the weight of the graphite anodes may destroy   
   them in transit.   
      
   ml> ...Beauty is in the eye of the beer holder....   
      
   Nice translation of the original .   
      
   Seasons Greetings,   
      
   Holger   
      
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