User Manual

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Taper Current Charging
This method of charging is not recommended due to the
constant current characteristics of taper charging being
somewhat harsh on valve regulated lead acid batteries.
This particular charging regime can often shorten battery
service life. However, because of the simplicity of the
circuit and subsequent low cost, taper current charging is
often used to charge a number of series connected
batteries that are subject to cyclic use. When using a
taper charger it is recommended that the charging time
is either limited or that a charging cut-off circuit be
incorporated to prevent overcharge. Please consult us
for specific recommendations.
In a taper current charging circuit, the charging current
decreases gradually and the charging voltage rises
proportionately as the charge progresses. When designing
a taper charger it should be borne in mind that variations
in the mains input supply will be reflected in the output
of the charger. Figure 18 illustrates the characteristics of
a typical taper charger.