Make sure all charging components are securely plugged in. If that still doesn’t work, try switching to a different outlet. One of the most common reasons why your iPhone won’t charge is because dust, lint or other debris has accumulated into the charging port, preventing the charging connections from working properly.
How long should I charge my iPod?
Apple says “A depleted battery can be 80-percent charged in about two hours and fully charged in about four hours.” You can usually check what kind of charge your iPod has from looking at the colour of the light when you turn it on. Yellow is medium charge, green is fully charged I think whereas red is almost ‘flat’.