The Ipad Mini comes with a small AC battery charger. Here are a few details about this charger converting AC mains to 5 Volts DC.
Ipad Mini AC battery charger - Model A1400
Below the AC adapter for the Ipad Mini for the European market.
The Model A1400 battery charger connects to a standard USB lead. The AC adapter can also be used to charge other USB connected battery operated devices.
Ipad Mini AC adapter specifications
The AC mains USB battery charger takes 100 to 240 Volts AC mains at 50 or 60 Hz and converts it to 5 Volts DC upto a maximum current of 1 Amp.
This Apple AC mains charger is produced by Flextronics. The company has its head quarter in Singapore - however produces their products in China.
A few similar AC mains battery chargers for the Ipad Mini with other functions as well.
More about FlexTronics in Singapore.