ThinkPad X3 UltraBase

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ThinkPad X3 UltraBase (46P7912)

This is a proprietary docking station for models with a CS00 standard docking port.


  • 1x PS/2 (Mini-DIN 6, keyboard+mouse) port
  • 1x USB 2.0 (Type-A) port
  • 1x Modem (RJ-11) port
  • 1x Ethernet (RJ-45) port
  • 1x VGA-out (DE-15) port
  • 1x Parallel (DB-25, ECP/EPP/SPP) port
  • 1x Serial (DE-9, RS-232) port
  • 1x Ultrabay Plus slot1
  • 1x Kensington security lock slot
  • 1x DC-in (barrel) socket
  • 2x Audio speaker (stereo)
  • 1x X3x battery pack slot2


  1. Ultrabay batteries are supported, but they cannot be physically inserted if an X3x battery pack is installed in the UltraBase. In other words, simultaneous use of both batteries is not supported.
  2. This battery slot cannot be used if an Ultrabay battery is installed into the Ultrabay.

Part numbers

  • 91P9025 (91P9024), 46L4865 (46L4866)

Models supporting this accessory