DIY USB battery box

This is the second version, the first version can be found here:

http://osastrolog.blogspot.com/2007/03/diy-usb-battery-box.html

This time, I found some more suitable parts. First of all, you need to make sure the pin layout are correct:-



The USB sockets for those computer back panel is superb for this purpose. Better than last time the USB->PS/2 adapters.

So, I go and buy a small plastic box, it costs only two dollars. And to host the batteries, a $5 box is used. I'm talking about HKD.

Since this USB back panel socket has threaded screw holes there, attaching them to the box is so easy and elegant:-

To avoid the battery container from moving around inside the box, you can add some foam inside to eat up the empty spaces.