How long can the battery power last?
Charge phone and display together: take 835SD 20800mAh for example , it can charge 10 Phones each 1000mAh /day while running the digital screen for up to 15 hours.
Charge phone and display together: take 835SD 20800mAh for example , it can charge 10 Phones each 1000mAh /day while running the digital screen for up to 15 hours.