BATTERY DRAIN (Average Alkaline Values with Backlight Off)
          22 Mar. 2002 (Add GPSmap 76S)
          17 Dec. 2001 (Add Vista, GPSmap 76, G-V, and Meridian)

[NOTE]: Divide battery-drain measurements into 1800mah for 
battery-life estimate. Tests were made in the NORMAL mode.
                                                      
                     Internally Powered                
                  ------------------------------------              
                              Antenna Connected##             
       (Tested)    Receiver   ------------------   Batt   
Model    Ver.     Sim    ON*    (Garmin) (Lowe)   Voltage°
----------------------------------------------------------
G-II+    2.04     28ma   81ma     NA      118ma    5.35     
G-12XL   3.02     32ma  128ma   141ma      NA      6.00    
G-12XL   3.51     30ma   76ma    89ma     102ma    5.95     
G-12XL   4.00     15ma   88ma   101ma      NA      5.90     
G-12     3.50     32ma   75ma     @        @       6.00  
G-12     4.54       NA   83ma     @        @       6.03  
G-III+   2.01     34ma   82ma    95ma     105ma    5.94
G-V      2.01     58ma   90ma (175ma with backlight max)                
St Plt&  1.00    105ma  120ma   133ma      NA      8.30  
  &Six batteries
eMap#    2.04     60ma  120ma   130ma      NA      3.00
Legend#  2.30     50ma  120ma    NA        NA      2.95  
Vista#   2.16     50ma  165ma*   NA        NA      3.00  
  *120ma with compass off
G76Map#  2.04     62ma  120ma   130ma      NA      3.00
G76SMap# 1.06    100ma  175ma*  185ma      NA      3.00
  *125ma with compass off
  
#Two batteries
## (Garmin = GA26, GA27, GA26C or GA27C)
* Searching
° On Garmin models, the lower the battery voltage, 
the higher the current drain.

                             [LOWRANCE]
EEx2     3.00    110ma  110ma     @        @       6.00   
EEx2     3.00   Power-Save mode=40ma to 110ma in three-second cycles
GM100    1.20    180ma  180ma     @        @       6.00  
GM100    1.20   Power-Save mode=84ma to 180ma in three-second cycles
  @Has no external powered antenna capability

                              [MAGELLAN]
M-315#   1.03     NA    145ma     @        @       3.00  
M-330M#  2.03     NA    145ma     @        @       3.00
M-GOLD#> 2.09     NA    145ma     @        @       3.00      
  @Has no external powered antenna capability
  #Two batteries
  >Meridian Gold

Tests were made with the units in the search or simulator modes.
Sim=Simulator Mode
NA=Not Available for testing

            BACK LIGHTS:
  Garmin G-12with full battery gauge:    
    Light ON Low     Add  4ma
    Light ON Med     Add  9ma
    Light ON Max     Add 16ma   
  Garmin G-III:
    Light ON Low     Add 16ma                   
    Light ON Med     Add 32ma
    Light ON Max     Add 64ma   
  Street Pilot with full battery gauge:
    Light ON normal: Add 120ma
    Light ON    max: Add 210ma
  Eagle Expedition II with full battery gauge:
    Light ON max:    Add 80ma 
  GM100 with full battery gauge:
    Light ON max:    Add 60ma

The above submitted by Ron Henderson, Jose Camara, and Jeff Thieleke
-------------------------

Pierre Morin did some interesting measurements of the current consumption
of his Garmin GPS12 indicating that with low battery voltages, turning on
the backlighr REDUCES the current!

 VOLTAGE      BACKLIGHT       BACKLIGHT       BACKLIGHT       BACKLIGHT
                 OFF             LOW             MEDIUM        BRIGHT
 4.3v           129ma           110ma           119ma           121ma
 5.0v           114ma            93ma           100ma           107ma
 6.0v            86ma            86ma            90ma            93ma
--------------------------------------

Dave Martindale, using a regulated 5 vdc power supply, made the 
following antenna current measurements:
        Garmin GA-26            12.7 ma @6vdc
        Garmin GA-27C           10.0 ma @3vdc 
        Trimble hardmount       18.6 ma
        old Lowe                22.0 ma 
        new Lowe                22.8 ma
        Trimble mini OEM        29.0 ma
        Tri-M Mighty Mouse      12.1 ma

       
[EOF]