Mobile device charger standards
The Micro-USB interface is the new standard charger for mobile phones.As of June 14, 2007, all new mobile phones applying for a license in China are required to use the USB port as a power port.[33][34] This was the first standard to use the convention of shorting D+ and D-.[35]
In September 2007, the Open Mobile Terminal Platform group — a forum of mobile network operators and manufacturers such as Nokia, Samsung, Motorola, Sony Ericsson and LG — announced that its members had agreed on micro-USB as the future common connector for mobile devices.[36][37]