Toshiba T4500 User Manual page 20

Battery Indicator LED
The Battery Indicator LED is located next to the battery pack slot on the front of the T4500/T4600
Family computer and is identified by a battery icon. The indicator shows the status of the remov-
able battery pack, power supply, and AC adapter.
The status of each can be determined by color:
Orange The battery is being charged. (AC adapter is attached.)
Green The battery is fully charged. (AC adapter is attached.)
No light The AC adapter is disconnected from the computer or the AC adapter is attached,
but it cannot charge the battery for one of the following reasons:
The battery is extremely hot. Allow the computer and the battery to reach room
temperature before attempting to charge the battery.
The battery is almost fully discharged. The battery will not begin charging
immediately in this state, it will begin charging a few minutes after the AC
adapter is connected.
Main Battery's Overload Protective Circuit
The main battery circuit is shown below:
1-20
Figure 1-12 Main Battery Circuit (Nickel Cadmium)