The device is characterised by the following properties:
• short-circuit and reverse-polarity protection
• Constant charging end voltage
• No charging if battery is connected with reverse-polarity
• Charging is only carried out if the battery is connected correctly
• Visual display, for net, charging and reverse-polarity
This article was verified according to the EG-regulation (89/336/EWG (EMVG as of 09/11/1992,
electromagnetic compatibility) and complies with the legal regulations. Any modification of
connection or use of other accessories other than the ones specified, terminates the approval.
As opposed to common chargers, the charge current of this automatic charger does not represent a
precise value and depends on various factors. This includes e.g. the charge condition of the battery,
the battery age, the battery type or capacity. In addition, it is important how much the battery was
discharged before. If the battery was extracted a lot of current, a high initial charge current will take
place at the beginning (max. 0,6 A) that will diminish after a short time. This means with increasing
voltage of the battery, the charge current decreases.
The following graph demonstrates this behaviour.
Charging curve AL 600 time
The charging time, until the charging end voltage is reached, depends on several parameters, e.g.
• the capacity (Ah, the bigger the longer the charging time)
• the battery type
• the charging condition of the battery (full, partly charged, flat),
• the ambience temperature
• the general condition (age) of the battery.
The charging time is based on the above parameters and can roughly be calculated according to the
following formula (for a rough time estimation):
Capacity of the battery in Ah
Charging time (in hours [h]) = ------- x 1,4
Charge current 0,6A
Example: Lead-gel-battery 12 Ah, flat
12 Ah --------x 1,4, the charging time amounts 0,6 A to approx. 28 h
Towards the end of the charging process (battery is full), the yellow LED “loading” usually
switches off. Older or high-capacity batteries may show an extremely high self-discharge (approx.
1% of the battery capacity) and the plug connector may not recognize this elevated conservation
charge current as a completed charging cycle (yellow LED-display is not switched off). In this case
the plug connector works as a buffer to compensate the self-discharge of the battery.
Generally, as for more recent batteries, the LED switches off once the battery if fully charged.
Batteries of different capacities can be charged, bigger batteries have a longer charging time
whereas smaller batteries have a shorter one. As far as the charging process is concerned,
it does not make any difference whether the battery is partly or fully discharged.
The batteries may also remain connected to the charger, the ambience temperature should not
