>> I don't really know what that means: 1 amp was pretty typical for 2011.
I'm not sure what your point is either. If 1 amp was typical by 2011 then less than 1 amp/1000ma wasn't unusual then or before. AIUI the original USB power supply was intended to keep a mouse, keyboard or just possibly an MP3 player going, not to charge a phone or SatNav.
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