C) Discharge Current - VOLTCRAFT CHARGE MANAGER 2024 Bedienungsanleitung

The example batteries from chapter 8. a) would result in the following charge currents:
1000 mAh x 1.0 C = 1000 mA
2700 mAh x 1.0 C = 2700 mA
The „Charge Manager 2024" does not always offer the precisely fitting charge current.
In such cases, the next lower current range is the correct choice. For the 2700 mAh rechargeable battery, this
means a max. charge current of 2500 mA.
A charge current limitation to 2C is recommended for:
• Rechargeable batteries with the print „Rapid charge: 60 - 70 minutes at xxx mA" or „Rapid charge" or „Rapid
charging possible"
For example, the 2700 mAh rechargeable battery is to be charged at 3000 mA here, since 2C exceeds the
maximum.
When charging a battery with a charge rate of 1C or 2C, the battery will heat up noticeably towards the
end of the charging process. This is normal.

c) Discharge Current

In the „Charge Manager 2024", a discharge current of 125 mA to 750 mA is available for NiMH and NiCd recharge-
able batteries in steps of 125 mA; for NiZn-batteries, 150, 300, 450 and 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 2024".
Normally, the battery capacity is determined at a discharge current of 0.2C. 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 250 mA, and for the 2700 mAh batteries, a discharge current of 500 mA results.
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