Acer TravelMate 4100 Series User Manual page 23

In addition, there are two indicators at the front panel. Even when the
cover is closed, the state or features can still be seen.
Icon Function
Power
Battery indicator
1. Charging: the light shows amber when the battery is charging.
2. Fully charged: light shows green when in AC mode.
Description
Lights when the computer is on.
Lights when the battery is being charged.
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