The cellular phone carrier group Open Mobile Terminal Platform (OMTP) in 2007 endorsed <answer>micro-USB</answer> as the standard connector for data and power on mobile devices In addition, on 22 October 2009 the International Telecommunication Union (ITU) has also announced that it had embraced <answer>micro-USB</answer> as the Universal Charging Solution its "energy-efficient one-charger-fits-all new mobile phone solution," and added: "Based on the Micro-USB interface, UCS chargers also include a 4-star or higher efficiency rating—​​up to three times more energy-efficient than an unrated charger."
What has energy-efficient one-charger-fits-all new mobile phone solution?
micro-USB