I have an iPod Touch 3rd Gen. as well as it’s been operative excellent given we paid for it, until yesterday. When we plugged it to iTunes, it simply pronounced "Charging is not upheld with this accessory" as well as refuses to charge. What should we do to get it to assign again?

I hate that, it only works with actual Apple products, or Apple approved products /:
are you using an apple charger or a charger from another brand?
you could try and reset the ipod