New on the market is this illuminated visible current flow charge cable. You can actually see the flow of current going into your iPhone, iPad, iPod etc.

The cable has a intelligent power managements system built in so this means when your phones fully charged the cable illumination turns off. The current flow speed is dependent on how flat your device is.The lower your battery the faster the current flows. Once nearly charged the Illuminated EL strip slows right down before stopping and turning off.

Its hard to describe the effect so here is a video that speaks a thousand words