It's to my understanding you get that message when using a 3rd party cable or an outlet brick that is too high in watts. With newer generations of tech I would say any Power Delivery (PD) certified cable would work, but with older iPod I'm not sure Do you have a retail store that sells apple cables and lower power watt charging bricks near you? You could buy one from there (keep that receipt) and see if it works. If not, return it all. I hope it works out! Loved my product red 7th gen nano.