The various indicators have the following meanings:
The LED blinks alternatively red and green: The batteries are being charged and discharged alternately. (Refresh function: With this, older batteries or batteries that have been stored for a long time will be refreshed.)
The LED blinks green:
The batteries are being charged by a battery preserving impulse charge.
The LED continuously glows red:
The batteries are being charged with the maximum charge current.
The LED continuously glows green:
The batteries are fully charged and the Battery Charger has switched to a trickle charge.
Notice:
Should Type C or D batteries be charged in the outer charging slots, the operating condition is displayed by the respective outer LEDs.
Warning!
The batteries could become hot during charging. NEVER touch hot batteries! There is a danger of being burnt!
•Remove the power cable of the Battery Charger from the plug socket and allow the batteries to
cool down.
Afterwards you can remove the charged batteries from the Battery Charger.
Calculating the average charging time
Dependant on the type, age and remaining battery charge, hence the charging process takes different lengths of time. The average charging times can be calculated using the following formula.
Note, however, that the times calculated are only indicative.
Current time (Min.) =
Capacity of the battery (mAh) x 1,5 x 60 Charging current of the appliance (mA)
Automatic charging control/
Retention charging
This Battery Charger controls the charging time for rechargable batteries of the types Ni Cd and Ni MH separately. This control is based on the Δ U („minus Delta U“) calculation.
In mathematics, with Delta Δ differences are described.
„Minus Delta U“ in this case means a negative voltage difference.
This charge identification makes itself useful in the following effects:
Should a battery be charged with a constant current, its voltage rises continuously. When the battery is full, its voltage reaches a maximum and falls lightly with further current flow. This light fall in voltage is recognised by the charging electronics and the charge process is terminated. The Battery Charger automatically switches to „Retention charging“. This means that the batteries are no longer being charged with continuous power, but with short power impulses instead. This counteracts the process of self discharge, thus retaining the batteries in a fully charged condition.
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