Advent 1000 series laptop chargers mainly run on the output power of 20v 3.25a. The Advent 1000 series chargers include the AC adapter and mains cable plug. These are branded chargers for Advent and are normally manufactured by Lishin, Delta or Liteon. We will only send an original branded power adapter that will charge your notebook battery while on switched on, turned off or in sleep mode and even if your battery is no longer fitted or functioning it can simply power on your laptop computer.