Uniden UH-040XR - Manual (Page 16)

BATTERY LEVEL DISPLAY
The icon in the bottom right hand corner of the screen indicates
the UH-040XR current battery voltage level at all times. The battery
level is displayed in 3 levels:
LEVEL 3
Battery 100% full
LEVEL 1
Battery approx
30% capacity
LEVEL 2
Battery approx
70% capacity
Almost Empty
Note:
When
[PTT] SW is pressed at
Level Empty, battery icon and
channel number will flash
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