ACCURAT Opti 5 Operating Manual page 35

Charging Stages
4: Absorption
Stage
The charge rate slows down so the battery can absorb more power and
reach 100% charge. The voltage remains at a constant 14.4 volts for
12V charger or 28.8 volts for 24V charge while the current is gradually
reduced until no more power can be added without over-charging the
battery.
5: Battery Test
Stage
An automatic battery test is conducted immediately after the
absorption stage. The test monitors the voltage for 90 seconds to
determine if the charge was successful.
• 12V charger
If the voltage is below 13.2 volts (fail), the charger will initiate the
Recondition stage.
• 12V charger
If the voltage is above 13.2 volts (pass), the charger will proceed to
the final stage: Float.
• 24V charger
If the voltage is below 26.4 volts (fail), the charger will initiate the
Recondition stage.
• 24V charger
If the voltage is above 26.4 volts (pass), the charger will proceed to
the final stage: Float.
6: Recondition
Stage
The battery reconditioning function is initiated automatically in the
case that the battery fails the battery test (stage 5). Failing the battery
test indicates that the absorption stage was unable to fully charge
the battery. The recondition mode will then begin to introduce a low
constant current for a period of 4 hours. Then the charger will go into
float charging mode.
This recondition stage can recover batteries from a deeply discharged
state increasing performance and battery life.
RECONDITION: This mode is used to recover deep discharged flooded
batteries where you could expect a stratified acid (high acid weight
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