Charging The Gpsmap 378/478 - Garmin GPSMAP 378 Owner's Manual

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ETTING TARTED HARGING THE

Charging the GPSMAP 378/478

Before using the unit, you might need to charge the battery in the
GPSMAP 378/478. Plug the unit into an external power source to
charge. You can use the unit while it is charging.
To charge the unit's battery:
1. Lift the rubber weather cap to expose the power connector
on the back of the unit. See the image on page 1 for
connector location.
2. Align the notches and push the plug into the connector until
fully seated.
3. Plug the 12 Volt adapter into an available AC outlet, or
cigarette lighter receptacle if you have a cigarette lighter
adapter. Use care when routing the cable; be certain that it
does not interfere with vehicle operation.
The unit begins charging as soon as external power is applied.
Placing the unit in Charge Mode charges the unit more quickly than
when the unit is turned on and reduces draw on the vessel/vehicle
battery.
Information About Charge Mode
Applying external power to the GPSMAP 378/478 automatically
turns on the unit for full operation. If the battery is present and needs
to be charged, the external power source charges the battery while
the unit is in use.
2
GPSMAP 378/478
If you do not want to use the unit, but you would like to charge the
battery, you can put the unit into Charge Mode. Connect the unit to
an external power supply. Press and hold the POWER key. Instead
of completely turning off, the unit now goes into Charge Mode.
Charge Mode
NOTE: While in Charge Mode, the unit draws a small amount
of current from the vessel/vehicle battery. To avoid discharging
the vehicle's battery, disconnect the external power cable from
the GPSMAP 378/478 when not in use for several days.
After using the unit a lot, you might notice that the lithium-ion
battery in the unit is not holding a charge any more. This is common
for lithium-ion batteries. Contact Garmin or your Garmin dealer to
order a battery pack replacement if you are experiencing charging
issues with your battery.
GPSMAP 378/478 Owner's Manual