Part of the show Power to your Elbow: Better Batteries
Sybil Chaban asked:
Is there a difference between charging from the mains and charging from USB?
Graham Verity from GP Batteries - There isnít a difference. I mean, the USB probably doesnít in some circumstances have the ability to give quite as much power to the charge, but generally speaking, the USBs you have on your computer will charge in roughly the same time.
Both a mains charger and a usb socket will give your phone 5V depending on the specs of both the current they provide will be different so the rate of charging can be different, between chargers and USB sockets.