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The first laptop with X1 branding was the ThinkPad X1 – the 13-inch sub-compact model, the thinnest and fastest charging business laptop at the time of release in 2011. [5] In contrast with previous 13-inch X series model (X301), it has only one RAM slot and only one storage slot.
X1 Carbon 1st Gen The ThinkPad X1 Carbon's keyboard (Japanese), track point, and touchpad. In early August 2012, Lenovo released the first generation of ThinkPad X1 Carbon announced on 15 May 2012. [55] The X1 Carbon weighs 1.35 kg (3.0 lb), has a battery life of roughly eight hours, and has a start-up time of less than 20 seconds.
Under certain conditions, some battery chemistries are at risk of thermal runaway, leading to cell rupture or combustion. As thermal runaway is determined not only by cell chemistry but also cell size, cell design and charge, only the worst-case values are reflected here. [64]