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How long does a UPS battery last
 General questions - what UPS fits best for your use?   Started by NB-23   2025-08-19 14:15:02 +01:00   Comments: 2    Viewed: 55

  1. NB-23
    NB-23 Member Warrington
    It depends on the use. Gereral range is 3-6 years.
    Things batteries dont like
    Heat, constantly discharge and recharge cycling , left discharged, discharged at too high a current, float voltage out of whack (aim for 13.7V DC on most cell types).

    We are interested when customers come back with much longer than normal runtimes. Today we got something of a record
    RBC55 kit, used in the SUA2200i which lasted from 12 July 2018, to today (18 Aug 2025) - so over 7 years in use.

    Recording here for record, intending to add more as we get them.

    2_1755609293_s-l1600.jpg
    NB-23, 2025-08-19 14:15:02 +01:00
    #148
  2. NB-23
    NB-23 Member Warrington
    Broad strokes on why the cell ages more with the things I mentioned

    Heat - increases rate of chemical reaction which is constantly undoing the cell internals
    Cycling all the time - they are built with 300 cycles in mind (varies from model)
    left discharged - changes internal chemistry and can line the plates with an insulator
    high current - damages / pits the lead plates and the internal grid
    too high a float voltage causes heat, thats why gave 13.7 as the target rather than the normal range 13.7-13.9V

    welcoming alternative points of view!
    NB-23, 2025-08-19 14:17:38 +01:00
    #149

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