Mine is definitely AC1 on the plug in part. And says 1500 ma.
No idea why they changed, perhaps to discourage the common usage of other USB adapters, maybe the specs are less common.
Could be problems with 1500 ma., but I think we would have read about them by now.
Or maybe the parts were cheaper.
Anyway I will continue to use mine as it was'nt cheap and has caused me no problems. And yes I think it does charge faster.
Perhaps someone will chime in with more info.
Helen
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