IBM thinkpad R31 - 1.0Ghz, 40GB hdd, 1024MB, DVD, Winxp

• Width: 313 mm (12.3 in)
• Depth: 254 mm (10.0 in) 3
• Height: 36 mm (1.42 in)

Notes:

• These weights indicate the weight of models without wireless function. The weight of wireless models is 20 g (0.045 lb) heavier than models without wireless function.
• Li-Ion battery is lighter than a NiMH battery. The Li-Ion model is lighter than the NiMH model in the same configuration.

Accessories

• Battery pack (NiMH): 538 g (1.186 lb)
• Battery pack (Li-Ion): 327 g (0.721 lb)
• AC adapter (2-pin or 3-pin)
• Power cord for AC adapter

Note: Actual specifications and weights may vary based on features, vendor components, or manufacturing processes.

Electrical specifications

• Universal AC adapter (72W)
  • Input is 100/240 V AC, 1.5/0.9 A, 50/60 Hz
• • Output is 16 V DC, 4.5 A
• NiMH battery pack: 9.6 V, 4.5 AH, 8 cell/pack
• Li-Ion battery pack: 10.8 V, 4.0 AH, 6 cell/pack

Heat dissipation

• 245 Btu/hr maximum

Heat emissions

• 72 watts maximum

Air temperature for shipping and storage

• -20 degrees to 60 degrees C (-4 degrees to 140 degrees F)

Acoustic noise level

• Sound power level:
  • 4.8 Bels (idling)
  • 5.1 Bels (HDD seeking)
• Sound pressure level at the operator position: 40 dB (HDD seeking)

Note: All measurements are made in accordance with ISO 7779 and reported in conformance with ISO 9296.

Operating environment
ThinkPad computers are designed, built, and tested for high quality and reliability. When used properly in standard business environments, a ThinkPad system should be a reliable computing asset for many years. However, harsh environments and abuse can damage ThinkPad systems since they are not intended to withstand extreme temperatures, dust, shock, or other severe physical environments. ThinkPad systems should not be used in unsuitable environments. For example, a ThinkPad system should not be used in non-stationary environments, such as in-vehicle installations, without additional casing or shock-dissipation. Lenovo warrants that the ThinkPad system will conform to its Official Published Specifications when used in a suitable physical operating environment.

Air Temperature

• 0 to 8,000 ft:
  • Operating:
    • 5 degrees to 35 degrees C (41 degrees to 95 degrees F) (without diskette)
      
    • 10 degrees to 35 degrees C (50 degrees to 95 degrees F) (with diskette inside unit)
  • System off: 5 degrees to 43 degrees C (41 degrees to 110 degrees F)
  • Storage/shipment: -20 degrees to 60 degrees C (-4 degrees to 140 degrees F)
  • Wet bulb (maximum): 29.4 degrees C (85 degrees F)
    
• 8,000 to 10,000 ft:
  • Operating:
    • 5 degrees to 31.3 degrees C (41 degrees to 88 degrees F) (without diskette)
    • 10 degrees to 31.3 degrees C (50 degrees to 88 degrees F) (with diskette inside unit)
  • System off: 5 degrees to 43 degrees C (41 degrees to 110 degrees F)
  • Storage/shipment: -20 degrees to 60 degrees C (-4 degrees to 140 degrees F)
  • Wet bulb (maximum): 25.7 degrees C (78 degrees F)
    

Note: The maximum temperature when the system is on is linearly decreased from 8,000 ft to 10,000 ft.

Relative humidity

• Operating: 8% to 95% (without diskette)
• Operating: 8% to 80% (with diskette inside unit)
• Storage/shipment: 5% to 95%

Altitude

• 10,000 ft maximum (3,048 m)

Agency approvals

System Unit

• FCC Class-B Certified to comply with FCC Rules, Part 15
• VCCI Class B
• CISPR22B
• UL-1950
• CSA C22.2 No. 950
• NOM
• SASO
• IEC950
• ACA
• MPR-II (Sweden)
• CE Mark
• CCIB (for China)
• BSMI
• CCEE (for China)
• JATE
• CER

Software requirements
The following operating systems support the ThinkPad R31 system.

• Microsoft Windows 98 Gold
• Microsoft Windows 98 Second Edition
• Microsoft Windows Millennium
• Microsoft Windows NT 4 (Service Pack 5)
• Microsoft Windows 2000 (Service Pack 1)
• Microsoft Windows XP Professional
• Microsoft Windows XP Home Edition
• Windows Vista
• Windows 7 - only with 1GB RAM