T3400/T3400CT Maintenance Manual
1.9 Batteries
The T3400/T3400CT has three types of batteries:
❑ Main battery pack
❑ Backup battery
❑ RTC battery
Battery specifications are provided in Table 1-8.
Table 1-8 Battery Specifications
Battery name Material Output voltage Capacity
Main battery pack Lithium-Ion 10.8 V 3,000 mAH
Backup battery Nickel Metal Hydride 1.2 V 1,200 mAH
RTC battery Lithium-Vanadium 3.0 V 50 mAH
1.9.1 Main Battery
The removable main battery pack is the primary power source when the AC adapter is not
attached. The main battery recharges the backup battery when system power is on. The
backup and main battery maintain the state of the computer system when AutoResume is
enabled.
❏ Battery Indicator
The battery indicator is located on the front left of the computer. The indicator color desig-
nates status of the removable battery pack and AC adapter.
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 is connected, but
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 and will not begin
charging until a few minutes after the AC adapter is connected.
❍ The AC adapter is not receiving power.
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