ThinkPad X4 UltraBase
ThinkPad X4 UltraBaseThe X4 UltraBase is a portable dock for the X40 and X41 ThinkPads providing extra ports as well as a bay for an optical drive and a set of stereo speakers. Containing a full featured Ultrabay Slim slot, it provides flexibility in drive choice as well as the option of a secondary battery for extended working time on the road. The X4 UltraBase doesn't provide a second docking port as the original UltraBase did, hence you can't dock the UltraBase to any of the other docking solutions. Features
Pros & Cons
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Ultrabay Slim
The Ultrabay Slim slot in this dock is a full featured one and supports hot swapping with all Ultrabay Slim drives. You can also feed it with the Ultrabay Slim battery pack to extend the overall battery life time.