Technoline BC 700 discharging problem

Описание: I read the manual (pages 46-47) on the online manual
http://www.technoline-berlin.de/manua...
and I have A BIG ISSUE:

DISCHARGE MODE
Discharge mode will first discharge the rechargeable battery then charge it. It is for removing the memory effects of rechargeable batteries.
By pressing the MODE key within 8 seconds after inserting the rechargeable batteries, the Discharge mode can be selected.
Then user may also select different discharging current (see Table 2) by pressing the
CURRENT key, within 8 seconds after inserting the batteries.

Table 2. DISCHARGE MODE Current
User-selected Discharging current 100 mA 250 mA 350 mA
Thereafter Charging current 200 mA 500 mA 700 mA

Finally batteries will be fully charged in discharge mode and "Full" will be displayed. If user presses DISPLAY key at this time, "charge" icon instead of "discharge" icon will be displayed.

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My problem is that I select DISCHARGE mode, and this mode stay on "DISCHARGE" and don't charge the battery as is described in the manual.
Even after half an hour, the current is still 100mA and I see the mAh rising slowly.
I tried with more batteries - two of them are in CHARGE mode, the other two are in DISCHARGE mode, and I saw that yes, "the charging after discharging" current is 100mA.