What can you just write to a cable? It does what it is intended, namely my iPhone and my iPad 4 6 charge and as it did the supplied cable with the same speed. Well so easy this is again not at Apple. With cheaper cables which are not certified can already be problematic. I speak, unfortunately, from my own experience. The cable is slightly thicker than the original cable, tend not bad because like any longtime Apple customer knows tend indeed to break to the Apple cable.
