The chargers for iPod and iPad look identical. You have to look closely to read the fine print indicating which charger is for which device. If you accidentally plug an iPad into an iPod charger - no harm done, as the iPod charger runs at a lower wattage. But what happens if you accidentally plug an iPod into an iPad charger? Is there some protective circuitry that prevents the iPod from getting fried? I've already figured that at some point I'll screw these up - so I put some labels on the chargers just to be on the safe side.