Lenovo S540 manual Operating environment, Lenovo programs, Battery pack, Battery status

• Input rating of the ac power adapter: 100 to 240 V ac, 50 to 60 Hz

Battery pack

Integrated lithium-ion (Li-Ion) battery pack

Battery status

To check the battery status, do the following:

•For Windows 7: Open the Power Manager program. Click the Battery tab. For instructions on how to start the Access Connections™ program, see “Accessing Lenovo programs on the Windows 7 operating system” on page 14.

•For Windows 8 and Windows 8.1: Press the Windows key to go to the Start screen. Click Lenovo Settings ➙ Power.

Operating environment

This section provides information about your computer operating environment.

Environment:

•Maximum altitude without pressurization: 3048 m (10 000 ft)

•Temperature

–At altitudes up to 2438 m (8000 ft)

–Operating: 5.0°C to 35.0°C (41°F to 95°F)

–Storage: 5.0°C to 43.0°C (41°F to 109°F)

–At altitudes above 2438 m (8000 ft)

–Maximum temperature when operating under the unpressurized condition: 31.3°C (88°F)

Note: When you charge the battery pack, its temperature must be at least 10°C (50°F).

•Relative humidity:

–Operating: 8% to 80%

–Storage: 5% to 95%

If possible, place your computer in a well-ventilated and dry area without direct exposure to sunshine.

Keep electrical appliances such as an electric fan, radio, air conditioner, and microwave oven away from your computer because the strong magnetic fields generated by these appliances can damage the monitor and data on the hard disk drive or hybrid drive.

Do not place any beverages on top of or beside the computer or other attached devices. If liquid is spilled on or in the computer or an attached device, a short circuit or other damage might occur.

Do not eat or smoke over your keyboard. Particles that fall into your keyboard can cause damage.

Lenovo programs

Your computer comes with Lenovo programs to help you work more easily and securely. Depending on the Windows operating system preinstalled, the programs might vary.

Chapter 1. Product overview 13