The battery also features super charge technology that promises a full day charge in just 20 minutes.An Indian start-up, Lechal, displayed shoes with smart soles which vibrate to guide users to their destination.Several phonemakers unveiled new smartphones with batteries that can last longer and be charger faster.CONNECTED DEVICESCompanies rolled out products based on a future centred on the "internet of things", a network of devices, vehicles and building sensors that collect and exchange…