From: roger@hayter.org   
      
   On 15 Apr 2025 at 12:55:49 BST, "Liz Tuddenham"  wrote:   
      
   > Carlos E.R.  wrote:   
   >   
   >> On 2025-04-15 13:30, Liz Tuddenham wrote:   
   >>   
   >> ...   
   >>   
   >>> However, it is usually  a good enough indicator for obvious cases of   
   >>> dying batteries that collapse after a few tens of seconds or boil-up   
   >>> under heavy load.   
   >>   
   >> That's the case, the battery went down fast. The UPS software had the   
   >> time to send me an alert email, but the event did not get written to   
   >> disk logs. The battery would make 2 years in service next august.   
   >   
   >  I would have expected a much better lifetime than that,  Does the   
   > charging system follow the battery manufacturer's guidelines?   
   > Continuous trickle charge can ruin a battery that isn't designed for it,   
   > some batteries thrive on an occasional discharge and re-charge.   
   >   
   > Battery technology is extremely complex.  There are so many ways of   
   > killing a battery; 'good practice' consists of juggling them to give the   
   > best compromise.   
      
   The brand leader American UPS company used to be noted for overcharging its   
   sealed lead acid batteries (to be kind it could be called getting the maximum   
   spec from the batteries) which probably shortened their life and there were   
   published circuit board mods to stop it doing so.   
      
      
   --   
      
   Roger Hayter   
      
   --- SoupGate-DOS v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)