South Korean tech behemoth Samsung Electronics Co. on Thursday launched its latest tablet PC at home that beefed up portability by further reducing its weight. The 8.4-inch Galaxy Tab Pro is powered by Android's Kitkat 4.4 of Google Inc. with a 4,800mAh battery, and is 7.2 mm thin. The device was first featured at the U.S. Consumer Electronics Show in Las Vegas in January.