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Detailed specifications - ThinkPad A31/p
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  • Excellent sound quality with two stereo speakers, 16-bit stereo audio supporting Sound Blaster Pro, built-in stereo speakers
  • Stereo audio with 3D sound and speaker technology
  • Volume up, down, and mute buttons
  • Three audio jacks:
    • One for external stereo speakers or headphone
    • One for an external microphone
    • One for line-in
  • 86 key keyboard with Embedded numeric keypad and integrated TrackPoint (TM) with enhanced features
  • 90 DBCS key keyboard with Embedded numeric keypad and integrated TrackPoint (TM) with enhanced features for Japanese systems
  • Embedded numeric keypad
  • The keyboard has a Fn key which is a special key and is located in the lower left corner. The Fn key allows the user to instantly activate the following operational features by pressing the Fn key and a designated function key: - Standby/Suspend/Hibernation - Switching between Display devices - Power management mode
  • Web navigation, 6 total, 3 customizable
  • ThinkPad button, allowing one-touch entry into Access ThinkPad
  • ThinkLight which illuminates the keyboard in low light conditions
  • 64-bit Double Data Rate (DDR) non-parity SDRAM memory
  • PC2100 at 266 MHz
  • 2 memory slots
  • Supports up to two 512 MB SDRAM SO DIMMs
  • Supports maximum memory up to 1.0GB
TrackPoint (R) with Press-to-Select, Internet scroll, and magnifying glass features for accurate and convenient control
  • Dual-mode, high-performance Mobile Intel (R) Mobile Pentium (R) 4 Processor-M at 1.6GHz, 1.7GHz, 1.8GHz or 2.0GHz
  • Enhanced Intel SpeedStep (TM) technology
  • 512 KB onboard L2 cache memory
  • 400MHz front side bus

  • IR transceiver for wireless file and data transfer and printing.
  • Speeds up to 4 Mbps.
  • Compatible with the Infrared Data Association (IrDA) IR data link specification
  • K56Flex v.90
Note: Public network download speeds are limited to 53kbps. Upload speeds are limited to 31.2kbps. Actual speeds depend on many factors and are often less than the maximum stated.
  • 10/100 Ethernet and 802.11b wireless, (depending on model)
  • Bluetooth on select models

  • One, integrated, easy-loading modular Ultrabay (TM) 2000
  • One, integrated, easy-loading modular Ultrabay (TM) 2000 Plus
  • UltraPort only on A31p
  • One Mini PCI IIIb slot
  • Two Communications Daughter Card slots
External ports
  • Two USB (One on left side, one in back) version 1.1
  • One Ethernet RJ-45
  • One parallel (EPP, ECP), IEEE 1284 compatible
  • One DB-15 external display
  • One 9-pin serial
  • Additional connector supports the optional Port Replicator and dock
  • Audio line in, audio line out, and microphone in ports
  • S-Video out
  • S-Video in with MPEG-2 video-capture capability on A31p only
  • IEEE 1394 FireWire port selected models of the A31p only
PC Card
  • Conforms to the PC Card Standard 95
  • The Type III slot can accommodate two Type I or two Type II, or one Type III PC card
  • Both 16-bit and 32-bit cards are supported.
  • PCMCIA 2.1 standard

Operating environment
Physical specificaitons
  • Width: 329 mm (13.0 in)
  • Depth: 272.5 mm (10.7 in)
  • Height: 44.6 mm to 46.8 mm (1.8 in to 1.9 in)
  • Travel weight: 3.18 kg (7.0 lb) with Li-Ion battery pack and weight-saver bezels in both bays
  • Weight: 3.45 kg (7.6 lb) with Li-Ion battery pack and DVD drive
Note: All dimensions are approximate.
Agency approvals
  • FCC Class-B Certified to comply with FCC Rules, Part 15
  • CISPR22B
  • UL-1950
  • CSA C22.2 No. 950
  • NOM
  • UK-PTT
  • JATE
  • SASO
  • IEC950
  • CCIB (for China)
  • BCIQ (for Taiwan)
  • ACA (Australia)
  • EMI Declaration of Conformity (New Zealand)
  • MPR-II (Sweden)
  • CE Mark

AC Adapter
  • AC adapter: This ac-to-dc converter supplies the necessary power to the computer. The ac adapter also charges the battery pack when it is installed in the computer.
  • Universal AC adapter (72 W):
    • Input is 100/240 V AC, 1.5/0.9 A, 50/60 Hz
    • Output is 16 V DC, 4.5 A
  • The battery pack is an internal power source to the computer when the ac adapter is not available. The battery pack is rechargeable and is charged using the ac adapter with the system.
  • A six-cell Li-Ion battery pack is shipped with the system. This same battery is also available as an optional feature for the A31 so that you can order a spare battery which works only in Ultrabay 2000
  • Output voltage: 10.8V
  • Charging current: 2.8A maximum (system on or off
  • Approximate operation and charging hours are:
    • Battery operation 2.0 to 2.5hr (*1) depending on model.
    • Power off/suspend charging (*2) 2.6 hr
    • Charging during operation (*2) 3.5 to 6.0 hr

      Results obtained using eTesting Labs Inc's BatteryMark (TM) Version 4.0.1. Battery life will vary based on many factors including screen brightness, applications, features, power management, battery conditioning, and other customer preferences.
      (*1) BatteryMark (TM) is a trademark of Ziff Davis Publishing Holdings Inc., an affiliate of eTesting Labs Inc., in the U.S. and other countries.
      (*2) Recharge time will also vary
  • Battery overview document.

  • Security Chip on selected models
  • Locking device in the security slot provides physical security.
  • A Power-on password (POP) protects the system from unauthorized
    use. If a POP is set, the password prompt appears:
    • Each time the system is turned on
    • When the system is returned to normal operation from suspend mode
  • A Supervisor Password provides a higher level of security than the POP. The Supervisor Password protects the system functions from being used by unauthorized users, and protects the hardware configuration from unauthorized modification.
  • A Hard Drive Password (HDP) protects hard drive data from unauthorized users. Once HDP is set, data on the hard drive cannot be accessed without the correct HDP. Because the HDP is stored in the hard drive, the data remains protected even if the hard drive is removed to another system. The HDP password prompt appears:
    • Each time the system is turned on

Operating system
The following operating systems are supported on the ThinkPad A31 and A31p systems:
  • Windows 98
  • Windows 98 Second Edition
  • Windows NT Workstation 4.0
  • Windows NT Workstation 4.0 Japanese
  • Windows 2000
  • Microsoft Windows XP Professional
  • Microsoft Windows XP Home
Note: Preloaded software utilizes the disk-to-disk recovery method.

Optical drive
  • 8X, 24X, 8X write speed of CD-R media
  • Bootable
Floppy drive
  • Only included with some systems
  • Available via USB or Ultrabay 2000
Hard drive features
  • A31 standard 2.5 inch 30GB
  • A31 standard 2.5 inch 40GB
  • A31p standard 2.5 inch 60GB
  • Supports two additional hard drives which can be used concurrently to offer expanded storage
  • S.M.A.R.T technology to issue an alert if a hardware failure is pending
  • ATA Bus Interface
  • 5400 rpm
  • Although you can upgrade the hard drive, it is not designed to be removed and reinserted on a regular basis. Repeated and frequent removal, for purposes other than to upgrade for greater capacity, can cause damage to the system. The Ultrabay 2000 hard drive adapter is designed to provide this flexibility with a second hard drive in the Ultrabay 2000

Display - A31

Large, brilliant 15.0-in SXGA+ (1400 x 1050) or XGA (1024X768) active matrix TFT display

Note: All displays are measured diagonally.

Graphic Controller
  • ATI Mobility Radeon 7500 chipset
  • AGP 4X
  • 166MHz bus

CRT only
640 x480 16M  16M 16M 16M
800 x 60016M  16M 16M 16M
1024 x 76816M  16M 16M 16M
1280 x 102416M  16M 16M 16M
1600 x 1200NA  16M 16M 16M
2048 x 1536NA NA NA NA

Display - A31p

Large, brilliant 15.0-in UXGA (1600 x 1200) active matrix TFT display

Note: All displays are measured diagonally.

Graphic Controller
  • ATI Mobility FIREGL 7800 chipset
  • AGP 4X
  • 183MHz bus
CRT only
640 x 480 16M  16M 16M 16M
800 x 60016M  16M 16M 16M
1024 x 76816M  16M 16M 16M
1280 x 102416M  16M 16M 16M
1600 x 120016M  16M 16M 16M
2048 x 1536NA NA 16M 16M

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Document ID : PD013817
Legacy Document ID : MIGR-58281
Last Updated :
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