VOLTCRAFT V-CHARGE 100 DUO, Operating Instructions Manual, Page: 109 / 236

109
Safety timer
If charging starts, the internal safety timer starts as well. If the charger cannot detect whether
the battery is fully charged for whatever reason (e.g. with delta-U detection), the charge process
is terminated automatically after a set time if the safety timer is on. This protects the battery
from overloading.
The safety timer can be switched on ("ON") or off ("OFF"); the time for the safety timer can also
be changed.
Do not set the time too short, since the rechargeable battery cannot be fully charged
then because the safety timer will cancel charging.
Calculate the time for the safety timer as follows:
Examples:
Battery capacity
Charging current Timer time
2000 mAh 2.0 A 2000 / 2.0 = 1000 / 11.9 = 84 minutes
3300 mAh 3.0 A 3300 / 3.0 = 1100 / 11.9 = 92 minutes
1000 mAh 1.2 A 1000 / 1.2 = 833 / 11.9 = 70 minutes
The factor 11.9 is used to permit charging 140% of the rechargeable battery capacity
(the rechargeable battery is guaranteed to be fully charged then), before the safety
timer trips.
Automatic deactivation at specific charging capacity
This safety function of the charger terminates charging automatically when a certain capacity
has been "loaded" into the battery.
The safety function can be switched on ("ON") or off ("OFF") and the capacity can be set.
However, do not set a capacity which is too low; otherwise the rechargeable battery
cannot be fully charged.
Capacity Cut-Off
ON 5000mAh
SAFETY TIMER
ON 120Min