12  FieldFox User’s Guide  
NOTE  When powered by the battery only, the FieldFox can stay in Stand By mode for a 
maximum of four hours and then it powers off automatically. When the relative 
battery charge drops about 20%, the FieldFox will power off to preserve the 
remaining charge. 
To recharge a battery: 
Use ONLY a FieldFox charger to recharge a battery. 
  The battery can be fully charged while in the FieldFox in about 4 hours with 
the FieldFox either ON or OFF. 
  The battery can be fully charged externally using the external battery charger 
in about 4 hours.  
  When the battery is removed, the FieldFox can still be powered by the AC/DC 
adapter.  
FieldFox ON/OFF Settings 
  To turn power ON, briefly press the power button. Boot-up takes about 1 
minute.  
  To switch to Stand By mode (low battery drain), briefly press the power 
button. To turn power ON, briefly press the power button. Power and settings 
are restored instantly.  See the Note above concerning Stand By mode. 
  To turn Power OFF (very low battery drain), press and hold the power button 
until power is OFF - about 4 seconds. Data and instrument state are NOT 
automatically saved when the FieldFox is powered OFF. Learn how to save 
data and instrument state on page 164. 
  You can make a setting to automatically Power ON the FieldFox when a power 
source is connected. Learn how on page 185. 
Power button LED status 
  Solid green – Power is ON 
  Blinking green – FieldFox in Stand By mode 
  Blinking amber – Battery charging.  
  Blinking amber and green – Stand By mode and battery charging. 
  Not lit – Power is Off and battery is not charging. 
FieldFox High-Temperature Protection 
The following features prevent degradation or damage in the event of high 
internal temperatures in the FieldFox. 
NOTE  Do NOT store the FieldFox in the softcase while powered ON or in Stand By 
mode. 
How to monitor the internal FieldFox temperature:  
  Press System, then Service Diagnostics. 
  Then Internal Temperatures.