C) Discharge Current - VOLTCRAFT Charge Manager 2016 Bedienungsanleitung

c) Discharge Current

In the „Charge Manager 2016", a discharge current of 150, 300, 450 and 600 mA is
available for NiMH- and NiCd-batteries; for NiZn-batteries, 200, 400 or 600 mA can be
selected.
For 9 V-block batteries, the discharge current is selected automatically. It is at a rated
current of 20 mA.
Long-term determination of a battery's capacity can be used to determine its current
condition (capacity loss).
The delivered capacity depends strongly on the discharge current: The lower the
discharge current the higher the capacity that can be delivered.
Since the battery is discharged via resistors, the actual discharge current depends on
the current battery voltage. This is, of course, also considered in the capacity
calculation (DCAP) of the „Charge Manager 2016".
Normatively, the battery capacity is determined at a discharge current of 0.2 C. For the
example batteries, this means:
1000 mAh x 0.2 = 200 mA
2700 mAh x 0.2 = 540 mA
The discharge current must be chosen that comes closest to the calculated value. For the
example 1000 mAh battery, these are 150 mA, and for the 2700 mAh batteries, a
discharge current of 600 mA results.
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