A:AnswerYes it is both 5 Watts and 5 Volts (1.0 amp). It is also a smart charger that will automatically convert 110 volt or 220 volt input to those figures. Here is a good discussion on these chargers. https://discussions.apple.com/docs/DOC-3511
A:AnswerYes you can use a 10w or even a 12w power adapter for any “I” products. The higher wattage will charge faster but the “I” product will only take as much charge as it needs and will not overload.
A:AnswerNo, the prongs on the small Apple USB Charger do not fold up.. This charger is only meant to be used for iPhones and iPods.
The larger, Apple 12 Watt Charger, is meant for iPads and comes in the box with them. This charger’s prongs fold in.
A:AnswerYes it can but use Sony recommendations on amperage. The Sony product might need more amps . Look up owner’s manual online or look on broken unit for amp rating . If the apple product heats up in a short time you need a bigger charger like a 2 amp plus unit , which is not this one . The older apple chargers are bigger / amp rating .