1. First, click the Settings icon from the desktop to access the Settings function.
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2. On the Settings screen, tap the battery option.
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3. On the battery interface, go down to find the two engine flash charge a few words, at this time, it is found that the button on the right is gray.
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4. Dial the gray slider to the right, so that the flash charge mode is turned on, and when recharging, it can greatly save time.