TAGLab C4 User Manual page 13

Stage 1: Diagnosis
The charger checks the battery condition and calculates the required charging parameters.
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Stage 2: Desulphation
The charger can rescue most drained batteries with voltages up to a minimum of 1.5 ±0.5 V.
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The safety switch does not allow the charger to start charging if the voltage is below 1.5 ± 0.5 V.
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At a voltage range of 1.5 ± 0.5 V to 10.5 ± 0.5 V the charger will initiate pulse charging.
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If the voltage rises above 10.5 ± 0.5 V, the charger will switch to the previously selected regular charging
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mode, which will charge faster and more safely.
Stage 3: Pre-charge
The battery is gently charged with a low charging current to return the battery to a chargeable state
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Stage 4: Soft start
The battery is gently charged with a low charging current.
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Stage 5: Primary charging CC1/CC2/CC3 (Constant Current):
The battery is quickly and safely charged at the maximum charging current.
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Stage 6: Absorption CV (Constant Voltage):
The battery is charged at a current end-of-charge voltage until charging current no longer flows. Voltage
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is kept at 14.6V DC.
Stage 7: Float Charge
Once the battery is fully charged, the charging process will stop. The charger will cut off with full charged
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status and achieves the high energy efficiency;
Stage 8: Reconditioning
After resting for 2 minutes from fully charged status if detected that the voltage dropped to 12.8V, the
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charger will charge at high voltage to recover the battery.
Stage 9: Restoring
The charger monitors a fully charged battery automatically. If the battery voltage falls below 12.8V, the
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charger will restart from stage 4 to stage 7.
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TAGLab Battery Charger | C4