In terms of charging speed, the 120W fast charge is faster than the 65W super flash charge. While the 65W Super flash charge is already a very fast charging technology, the 120W fast charge is a more advanced technology that can charge faster.
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Specifically, the 120W fast charge can fully charge the battery in a very short time, while the 65W super flash charge may take longer to reach the same state of charge. In addition, with a 120W fast charger, you get more battery power in less time, which means you can recover your phone's usage time faster.
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However, it is worth mentioning that the use of fast charge technology will also affect the life and health of the battery. If you use fast charging frequently, the battery life may be shortened, so the battery may need to be replaced more frequently. Therefore, for battery health and life considerations, fast charge technology should not be used often or for a long time.