What are the different USB power plug watt ratings and which one is the highest?

Apple 12W USB Power Adapter

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  • The current and the safest watt for charging the ipad is 2.4A. Which is the 12W adaptor. Be careful of those brand new 3.4A adaptors which gives a bigger watt ratings that could damage your ipad. It may charge your ipad at a much faster rate. But the capacitor that was built in the port may damage resulting in battery explosion.

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