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normal
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Fast charge one grid a minute is normal. In fact, a principle of fast charge, it is to increase our voltage, current to achieve an effect of shortening the charging time, of course, in this case, will basically have a loss to our battery, so it is recommended that in the case of conditions, or do not use fast charge.
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One grid a minute is not quite a flash charge, and 2 grids a minute is almost a flash charge.
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Mobile phone fast charging is mainly divided into three categories: VOOC flash Charge fast charging technology, Qualcomm Quick Charge 2.0 fast charging technology, and Mediatek Pump Express Plus fast charging technology