Honeywell Dolphin CT50 User Manual page 18

Chapter 1 — About the Computer Features
10
The Battery status LED in the upper right corner of the computer
indicates the charging status of the battery. You can also use the Battery
status LED as a notification LED. For more information on how to use the
LED as a notification LED, see
topics/ui/notifiers/notifications.html.
Out-of-Box Battery Status LED Descriptions
Connected to
Power LED State
No Blinking amber Battery level is below 20%
No Off
Yes Steady amber Battery level is between 0% and 60%
Yes Blinking green Battery level is between 60% and 95%
Yes Steady green
Either Blinking red
Dolphin CT50 and CT50h Mobile Computer User Guide
http://developer.android.com/guide/
Battery status LED
Description
Battery level is more than 20%
Battery level is above 95%
Battery error