I will have a closer look on that. I assume the HP needs to be turned on?

Hi, No, as far as I remember, the HP-P1 was not intended to charge iDevices when running in battery mode. Mine never did. The iDevice just shows a short flash 'connected'. On the other hand, thanks for the tip that you may charge via the HP, never tried to do so. Btw. battery time of my HP is...

Thank You so much for the hint to reset the iPod (in my case) when hearing clicking noises from the HP-P1!!!:):):) I had no idea why they suddenly started and had already tried out various cables, because a year ago I had strange clicking noises which resulted from a broken cable. Otherwise...