Garmin 278 Manual De Propietario

Before using the GPSMAP 278, you might need to charge the 

battery. Plug the power cable into an external power source to 

charge. You can use the unit while it is charging. 

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; make sure it does 

not interfere with vehicle operation. The unit begins charging 

as soon as external power is applied. 

  TIP: Placing the unit in Charge Mode charges the unit more 

quickly than when the unit is turned on and reduces draw on the 

vehicle/vessel battery.

When you turn on the GPSMAP 278 power source indicator on the 

GPS tab shows the unit is operating off battery power (

), that 

the unit is charging (

), or that an external power source is in 

use (

).

If you want to charge the battery when you are not using the unit, 

you can put the unit into Charge Mode. 

1.  Connect the GPSMAP 278 to an external power supply. 
2.  Press and hold the 

 

POWER key. Instead of completely 

turning off, the GPSMAP 278 goes into Charge Mode.

  NOTE: While in Charge Mode, the GPSMAP 278 draws a small 

amount of current from the vehicle/vessel battery. To avoid 

discharging the vehicle’s battery, disconnect the external power 

cable from the unit when not in use for several days. 

Over time, 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 battery charging issues. 

G

ETTING

 S

TARTED

 > 

C

HARGING

 

THE

 GPSMAP 278