Voltcraft CM 420 AA AAA Intelligent Battery Charger Station Charge Manager 420 Data Sheet

The voltage of the battery is indicated in the unloaded condition (and can therefore not be
measured during operation).

To give you a general idea of the state of the rechargeable battery this device displays a
battery symbol (“ ”). This symbol only serves to estimate how far the charge or discharge
process has progressed. When charging the battery icon fills from the bottom to the top
while it empties from top down when discharging. Conclusions regarding the expected time
remaining until the end of the programme are not possible from it. If the charging status of
the battery was not yet established, a question mark (“?”) appears instead of the battery
icon.

When charging and discharging the current flowing into the battery “I” is displayed. If no
current is flowing (e.g. in the mode “RDY” (“READY”), “ERR” (“ERROR”) or “STB”
(“STANDBY”)), the display shows “I=  -.---A”.

The display shows the time in hours and minutes (“HH:MM”) over which the battery was
charged and discharged. The time required for maintenance charge (operating mode “TRI”
= “TRICKLE”) is not considered.

The capacity (C) charged into the battery, as well as the discharged capacity (D) is stated
in milliampere hours (mAh) or ampere hours (Ah).

In programmes with several charge and discharge cycles, only the current values are
displayed. Data of the previous cycle are deleted. No calculation, display or addition of the
capacity of a maintenance charge (“TRICKLE”) are performed.