Toshiba M400 User Guide

User’s Manual

6-7

Power and Power-Up Modes

The Real Time Clock (RTC) battery provides power for the internal real 

time clock and calendar. It also maintains the system configuration.
If the RTC battery becomes completely discharged, the system loses this 

data and the real time clock and calendar stop working. The following 

message appears when you turn on the power:

S

You can change the Real Time Clock settings by pressing the F1 key. Refer 

to Chapter 9 

, for details.

The battery pack is a vital component of portable computing. Taking proper 

care of it will help ensure longer operating time on battery power as well as 

a longer life for your battery pack. Follow the instructions in this section 

carefully to ensure safe operation and maximum performance.

Mishandling of battery packs can cause death, serious injury or property 

damage. Carefully observe the following advisories:
Warning: Indicates a potentially hazardous situation, which could result in 

death or serious injury, if you do not follow instructions.
Caution: Indicates a potentially hazardous situation, which if not avoided, 

may result in moderate or minor injury or property damage.
Note: Provides important information.

1. Never attempt to dispose of a battery pack by burning or by throwing it 

into a fire, and never allow exposure to a heating apparatus (e.g., 

microwave oven). Heat can cause a battery pack to explode and 

possibly cause serious injury.

2. Never attempt to disassemble, tamper with or repair a battery pack. The 

battery pack could overheat and ignite. Leakage of the caustic alkaline 

solution or other electrolytic substances could cause fire, possibly 

resulting in death or serious injury.