Maintenance  
     
    • Check the tightening of connections.
    • Every month, it is recommended that the total voltage
      at the battery terminals be measured.
    • Once each year, it is recommended that the voltage of
      each cell in the battery should be read off.
    • A difference of plus or minus 2.0% between these
      individual voltages and the average voltage may be
      observed. This is due to the gas- recombination
      process.
    • A check on capacity (independent operation on load)
      can be performed once or twice per year.
    • Safety : When carrying out any work on the battery, the
      applicable safety standards should be followed.
    • Note : it is recommended that a battery log be maintained ,
      and that records should be kept of the total voltage 
      measurements, any mains failures, major battery
      discharges (current and time) etc.
    • The main factors causing reduction in the life expectancy of Shimastu cells:
      • Deep discharges
      • Poor regulation on the float voltage
      • Cycling or micro- cycling
      • Poor quality (smoothing) of the charging current
      • High ambient temperature.