Properties - VOLTCRAFT CHARGE MANAGER 2015 Bedienungsanleitung

The capacity data given by the manufacturer is the maximum theoretic quantity of current which can be
delivered by the battery. That means that for example a battery of 2000mAh can theoretically deliver a
current of 1000mA (= 1 ampere) for two hours. This value considerably depends on many factors (con-
dition of the battery, discharge current, temperature, etc.).
The term C-rate is very common for charging devices. The C-rate is the amount of current usually indi-
cated for the charging and discharging processes. This current value given in ampere corresponds to the
nominal capacity given in ampere-hours; that means that 1C = 2.0A for a battery of 2000mAh.
Please note that the battery capacity which can be drawn mainly depends on the discharge current: The
lower the discharge current the higher the capacity that can be drawn.
A discharge current of 850mA fließen circulate with this charging device at the start of the discharge pro-
cedure: for a battery with 850mAh, 850mA are already 1C, while for a battery with 1700mAh only C/2.
This is why the 1700mAh battery reaches its 1700 mAh easier than the 850mAh battery reaches its
850mAh.
Nowadays, noted manufacturers indicate C/5 for the capacity of an accumulator. That means that for
example a battery of 4000mAh achieves these 4000mAh for a discharge current of 850mA (= approx.
C/5). But if a manufacturer indicates a discharge current of C/10 (= 400mA) for a battery of 4000mAh you
can take it for granted that this accumulator cannot deliver 4000mAh for a discharge current of 850mA.
Therefore, the battery provided with the indication C/10 is the worse battery.
Batteries discharge themselves in the course of time. This property is known as self-discharge.

Properties

This is a speed charging device for nickel/cadmium and nickel/metal-hydride batteries.
The microcomputer-controlled charging process charges the batteries to 100%. 100% means up to 115%
of the capacity indicated for new batteries and less than 100% of the capacity indicated for older ones.
For batteris with a capacty of less than 800mAh the discharge capacity (D) may not reach 100%; this
discharge value, however, must be greater than 80%, otherwise the battery is broken (preferably test
with the ALIVE program).
This charging device does not require a discharge before starting the recharge process. Based on its cur-
rent charge status the battery is recharged to its currently possible 100%.
The recharging and discharging cycle is controlled independently of the charge status of the battery.
The charge and discharge current is micro computer-controlled.
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