I have found som interesting facts about RaPi
1: On this site is how much current it use www.raspberrypi.org/help/faqs/#powerReqs
2: The total USB power output for all USB ports on a RaPi is 600 mA (and not as the USB standard says >500 mA on each port)
RaPi B+ and 2B the total output current could be changed to 1.2 A by adding max_usb_current=1 in config.txt
To do this run:
sudo nano /boot/config.txt
go to bottom and add max_usb_current=1
save and reboot
Poul
1: On this site is how much current it use www.raspberrypi.org/help/faqs/#powerReqs
2: The total USB power output for all USB ports on a RaPi is 600 mA (and not as the USB standard says >500 mA on each port)
RaPi B+ and 2B the total output current could be changed to 1.2 A by adding max_usb_current=1 in config.txt
To do this run:
sudo nano /boot/config.txt
go to bottom and add max_usb_current=1
save and reboot
Poul