5 Hours Built-in multi safeguards to protect against overcharging overheating short circuiting friendly to computer battery.Works flawlessly with Surface and other devices without damage and erro message popping up. Refurbished Surface Pro 39W Power Supply 8J5-00001 - Refurbished Power Black. Surface Pro 39W Power Supply 8J5-00001 - Refurbished Surface Pro 39W Power Supply 8J5-00001 - Black Refurbished On the power adapter that plugs into the wall Full Charge Surface Pro Only 1.
0 charging station can charge mobile phones tablets digital cameras MP3 players wireless headphones e-readers portable speakers and other devices that charges with a USB cord.