Genuine Acer Aspire 3 A317-51 chargers are listed below for the known models with this ever increasing range of notebooks, simply check what model of Acer laptop you currently use, then select the same model below, if you cant find the full model name, then check the first part of the code and match below, Acer Aspire 3 A317-51 or Acer Aspire A317-51G with one of the top 2 chargers and the difference between these two power adapters is the 19v 2.37a will fit the smaller specifications of laptops within this series, where as the 19v 3.42a will fit all models within this series.