My Iphone takes really long to charge. I am on the battery sign with the red status signifying that I have little to no battery charge. Its been plugged in for 30 minutes already. What do i do?
the usb spec only gives the full amount of power if it can load the driver.
does the iphone show up in itunes on that computer?
alternately, do you have a different cable you can try?
also, how long have you had the phone? it's possible the battery is at the end of it's life