Battery Charger for the MK-III 3 Diver Intercom

OTS BATTERY CHARGER FOR MK3 RCS-20US

This battery charger, RCS-20US, comes with a detachable power cord for USA-style electrical outlets, and the output power cable is equipped with banana-style plugs that are required to plug directly into the MK3 Communications Board/ Unit. Because the MK3 is mainly used around water or on board a vessel, we have included basic instructions, cautions, and most importantly, safety warnings that must be followed. Not following these instructions and precautions could result in serious injury or death.

FEATURES:

DANGER!!!!!!!

WHILE RECHARGING THE BATTERY AND THE SAFETY
VENTS ARE OPEN. THE UNIT MUST BE KEPT AWAY
FROM WATER AND OCEAN SPRAY. FAILURE TO KEEP
THE UNIT FREE FROM WATER MAY CAUSE INJURY OR DEATH
 
            LED BATTERY CONDITION INDICATOR

CHARGE REMAINING            LED                   AUDIO TONE
100%                                    3 GREEN               NO TONE
80%                                      2 GREEN               NO TONE
60%                                      1 GREEN               NO TONE
40%                                       YELLOW           1 beep / 1 minute
25%                                          RED               2 beep / 30 second
 
At startup, if the LED is solid red, the battery is no longer holding a
charge and must be replaced.
3.1.1 BATTERY CHARGING
To charge the MK-III using AC power, connect the supplied charger/
Maintainer AC power cable to the Charger/Maintainer input (Fig. 1, #14).
Connect the Charger/Maintainer power plug to an AC power outlet that
supplies 90–240 volts at 50/60 Hz.
 
Safety Precautions:
When charging the battery, it is essential to open both safety vents.
Allow at least 20 minutes after charging for any gases to dissipate before
returning the unit to its operating position and closing the ventilation valve
(by rotating fully clockwise to prevent water entry).
A fully depleted battery can be recharged completely in about 3–5 hours.
While the battery is being charged and its voltage is below maximum, the
charge indicator LED located on the RCS-20US will illuminate red in color.
When the battery has been completely recharged, the charger will enter
trickle-charge mode to maintain maximum battery voltage, and the charger
LED will illuminate green.
Do not allow a battery to remain discharged for extended periods. While
in storage or long periods of non-use, charge the battery at least every 60-90
days. Failure to maintain a charge on the battery will fail to
take and maintain a charge.
Ensure that the RCS-20US is operated in a dry area and connected to
a GFI-protected circuit.