Re: On Either Side of My Apple Keyboard

[Kevin Reeves]

Hey Richy. There is  no battery in the keyboard. The USB ports on the 
keyboard split the small amount of voltage coming from that port. The 
keyboard itself is using some of that power, as well as the mouse. I've been 
able to plug in a sound card, a card reader, a USB External Hard Drive, or a 
mouse. However, some devices like my USB Midi Interface require way too much 
power, so it needs to be plugged into it's own usb bus, which is the other 
port on the back of your computer. Hope this helps.