I have a problem with my Raspberry Pi B+. First the problem was that I didn't get the keyboard or mouse to work and I have now found out that the Pi do not get enough power. When I looked on forums, they said the watt or whatever it is, should be between 4,75 and 5,25. When I check mine, it only have 3,30. This is probably enough to start the Pi, but not enough to run the USB ports. I have tried many different cables, both tried with normal cell phone charger and with iPad charger with another cable. But all of them give the same amount.
This may sound a little weird that all of them give the same amount of power, do you think I might check the power the wrong place on the Pi? I only find guides on how to check power on the normal, not the B+.
Thank you for help!