Dedicated connectors are generally cylindrical/barrel-formed coaxial electric power connectors; some vendors for example Lenovo use rectangular. Prior to the mid-2000s, specialized connectors have been much more prevalent. Reset ("cold restart") button and prompt ability off button in holes (necessary a skinny metal tool to press) Electric power button Specialized niche https://troyjcbqi.blogsvila.com/39574558/not-known-factual-statements-about-mobile