Garmin GPS 90 User Manual download pdf (Page 74)

The GPS 90 may be powered by four AA b a t t e r i e s ,

wired directly to 8-40 volt DC power, or by an optional

c i g a rette lighter plug adapter. The internal AA batteries

provide up to 15 hours of operation in normal mode and

up to 20 hours of operation in battery saver mode on 4

AA alkaline batteries. Rechargeable Ni-Cad or lithium bat-

teries may also be used. Note that the battery level indica-

tor is calibrated for alkaline batteries, and Ni-Cad and

lithium batteries will only show battery life at part i a l

scale. No other functions will be affected.

To install batteries:

1. Remove the battery cover by turning the thumb loop 1/4

turn counter-clockwise.

2. Insert batteries into position. The battery pole you can

still see should match the symbol marked on the case

3. Replace the battery cover by turning the thumb loop 1/4

turn clockwise.

Never store your GPS 90 without batteries. A built-in

rechargeable lithium battery will save almanac and way-

point data while you are changing the batteries, but will

only save data for a few months. If you’re storing the unit

for the season, put in a fresh set of alkaline batteries to

help prevent loss of stored data.

Appendix C

Batteries

& Electrical

Wiring

Battery Installation

⌃

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Garmin GPS 90 User Manual Page 74