Genuine and original Hp Pavilion 13-an1000 chargers are listed below, just simply select your model of laptop below and this will show the relevant charger specification, if you are unsure of the exact and only know the series, then check the Hp Pavilion 13-an1000 chargers as this series tend to only use the 19.5v 2.31a, so this generally fits every model with this series, but to confirm you can check this on the bottom of your laptop or notebook.