If your phone is also charging slowly while on standby, it is recommended to:
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1. Use the original charger to shut down and charge, and check whether the phone is slow to shut down and charge.
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2. If the phone only charges slowly when it is turned on, please:
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(1) End the background running program (recent application key in the lower left corner - End)
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(2) Uninstall the third-party battery management software from the phone
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If none of the above work, check out more solutions:
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(1) Check whether there is a version update on the phone and upgrade to the latest version.
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(2) Please back up the data in the phone and restore the phone to factory Settings.
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(3) If the above methods are ineffective, please bring the purchase invoice, repair card and machine to the service center, by professional after-sales engineers to help you deal with.