Lenovo ThinkPad T450s, User Manual, Page: 47 / 185

Power management
The power to run your computer can come either from ac power or from the battery.
Using the ac power
Your computer comes with an ac power adapter and a power cord.
• ac power adapter: Converts ac power for notebook computer use.
• Power cord: Connects the ac outlet and the ac power adapter.
While you use ac power, the battery charges automatically.
Connecting to ac power
To connect the computer to ac power, do the following:
Attention: Using an improper power cord might cause severe damage to your computer.
Note: Ensure that you perform the actions in the order in which they are listed.
1. Connect the power cord to the ac power adapter.
2. Connect the ac power adapter to the power connector of the computer.
3. Connect the power cord into an electrical outlet.
Tips for using the ac power adapter
• When the ac power adapter is not in use, disconnect it from the electrical outlet.
• Do not bind the power cord tightly around the ac power adapter transformer pack when it is connected to
the transformer.
• Before you charge the battery, make sure that its temperature is at least 10°C (50°F).
• You can charge the battery when the ac power adapter is connected to the computer. You need to
charge the battery in any of the following situations:
– When the battery icon in the Windows notification area shows a low percentage of battery power
remaining.
– When the battery has not been used for a long time
Chapter 2
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Using your computer
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