Is it okay to use the same charger for the iPad mini and the iPhone 5?

Are there any negative effects?
Please cite your references. Thank you!

Added (1). How about the cables wattage?

I think you can. I charge a ipad and a iphone with the same charger.

Yes, it's fine. Apple would be in trouble if their chargers were incompatible or caused negative effects on people's expensive iDevices.

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