原帖由： Ben ,
4.16V is definitely enough for the phone to switch on. Needs at least 3.7V minimum to turn on. I get around 4.14V when I have the charger plugged in and battery voltage being measured. If it's just the red bars in the low battery symbol then the battery voltage isn't really low then. But if the whole low battery display blinks (including cable icon at bottom) then the battery voltage is pretty low. I think it's probably best to let the phone charge for longer.