Cables (video, audio, USB) Juice

USB Charging Information Most devices can't/won't charge from normal powered USB hubs if the computer is turned off/not connected. That includes most Android, Apple iOS, and Windows devices. The phone more→/tablet must negotiate how much power to pull, to do so by the original USB specification, devices are supposed to only draw 100mA at first and then they can then negotiate up to 500mA. This negotiation requires a PC that's attached and on. Unfortunately even at 500mA, charging most devices will take a very long time to charge.
For example, the iPhone and most other non-tablets will charge on a standard port this way but they can also charge faster (up to 1A) if the USB port sends a special, non-standard …