... 4.5A max. 3,High capacity 50Wh laptop battery 4,Universal external battery I. Application: for 3C consumer product ... will auto stop charging MP3450D battery.while offer to Laptop’s loading current higher than 2±0.2A. ; ... loading current less than 2±0.2A. The Laptop’s demand power always priority oneof support from ... ~20V/4.5A high capacity for Laptop, netbook, ,DVD,tablet PC, iPhone/iPad/iPod,mobile phone