Holaday Industries 491198-48 Series User Manual page 20

10 -- Page Fast Charger Manual
If the probe is turned on during the fast charge period of
the charge cycle, the current surge that the battery
provides to the electronics in the probe will cause a
momentary voltage drop on the battery, causing the
charger to terminate the fast charge based on a peak
voltage detect condition. When a fast charging peak
voltage is detected, the charger COMPLETE LED (green)
will light.
The charger switches to Top-Off charge mode which
provides a charge current one eighth of the fast charge
rate. This charge continues from the time when a peak
voltage detect terminates the fast charge, until the
maximum time of 180 minutes is reached. If the probe is
disconnected from the charger at this point in the charge
cycle, the battery will still operate properly.
Following the maximum time of 180 minutes, a Pulse
trickle charge mode is used to compensate for the self
discharge of the battery while idle in the charger.
The batteries are quite small, and the fast charge current
is very low. The fast charge current is low enough that
there is not always enough heating of the battery cells to
cause the voltage to drop. With no voltage drop there is
no peak voltage detection, and the fast charge will
terminate after the maximum time of 180 minutes is
reached.
The chargers will not damage the battery even when left
connected for long periods of time.