13
BATTERY CHARGER DETAILS
To maximize nickel cadmium battery life, the M-RK vehicular
chargers are designed with automatic controls which limit the
rapid charging of M-RK batteries if the internal battery
temperature is below 0
°
C (+32
°
F) or above +45
°
C (+113
°
F).
The charger indicates this high or low internal temperature
condition by a yellow LED which blinks at a slow rate.
If a slow blinking, yellow LED is observed, the operator must
wait until the internal battery temperature stabilizes within the
allowable range before restarting the charging procedure by
removing and re-inserting the radio into the charger.
In a vehicular application, with either high ambient temperature
inside or outside of the vehicle, the automatic charging control
will often prevent rapid charging or limit the time of rapid
charging.
In other situations, where the operator inserts and removes the
radio many times during a short period of time, the automatic
control will sense a high internal battery temperature (due to
start-up rapid charging of the battery) and will prevent further
rapid charging of the battery until the internal temperature of the
battery stabilizes within the acceptable range.
NOTE
When the M-RK radio is placed in the charger, the radio's battery pack
is charged. The fast or "rapid" charge feature, normally is applied
immediately, and is controlled by the microprocessor circuits within the
charger. The following details apply to the battery charge feature:
• Normally, when initially placed in the charger, the battery pack is
fast charged and the yellow charge indicator glows continuously
until it is near a full charge (between 90% and 100% full charge).
At this time the charger switches to a slow or "trickle" charge rate
and completes the charge. During the "trickle" charge the green
ready indicator is illuminated.
• If the CHARGE INDICATOR flashes, the battery is not being fast
charged. Several factors may cause this to occur. These include,
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