3
GETTING STARTED
Power
The Map Guide Pro operates from AA batteries, a DURACELL
®
NiMH
rechargeable battery, or from 5 to 35 volts DC using the external power
cable. If the power cable is used, the Map Guide Pro automatically switches
to it if the external power is greater than the battery voltage. If for any
reason the external power fails, the unit automatically switches to the
batteries.
BATTERIES
The unit requires four AA batteries. We recommend you use alkaline bat-
teries for the best trade-off between battery life and cost. However, you
can use nickel-cadmium (ni-cad), or lithium batteries. You can also use
rechargeable alkaline batteries such as RayOVac
®
Renewals
®
. With the
exception of lithium, none of the above batteries will last as long as stan-
dard alkaline batteries. We recommend DURACELL
®
brand, but others
will work. Do not use “heavy-duty” batter-
ies or any type other than the ones listed
above. Do not mix different types of bat-
teries. (For example, don’t use both alka-
line and ni-cad batteries at the same time.)
Battery Installation
First turn the unit so that its back is facing
you. Push the two tabs to the left and re-
move the battery cover as shown at right.
Install the batteries according to this dia-
gram. (There’s a decal in the battery com-
partment showing the correct polarity,
also.) Replace the battery compartment
cover and the unit is ready for use.
NiMH Battery
The DURACELL
®
DR-121 nickel-metal hydride (NiMH) battery replaces
the four standard batteries. It is sold as an accessory, (model BR-1) which
includes a charger custom designed for the DR-121. The battery never
needs to be removed from the unit, since the charger connects to the
GPS receiver and charges the DR-121. You can even use the receiver
while the battery is charging!
To install the NiMH battery, remove the battery cover and place the bat-
tery into the compartment as shown on the next page. It will only fit one
way, so if it’s difficult to install, simply turn it over and drop it into place.
Replace the compartment cover and follow the charging instructions in-
cluded with the BR-1.