1. Check whether the wireless reverse charging switch is enabled
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The phone Settings path is as follows: Settings > Battery, turn on the wireless reverse charge switch.
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2. Please confirm whether the charging phone battery is above 20%
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If the battery power of the phone is less than 20%, please use the charger to charge the phone first, and then wireless reverse charging after the battery power is higher than 20%. When the battery of the phone itself is less than 20%, the phone will automatically turn off the external wireless reverse charging to ensure the normal work of the phone itself and a good charging experience.
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3. Check whether foreign bodies exist between the two mobile phones
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Please check whether there are other substances between the two devices, such as bus passes, metal rings, magnets, built-in metal protective shells, etc., if so, please remove them.
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4. Check whether the receiving device is placed in the center of the back of the charging device
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The location of the charged device will affect the charging efficiency, and the farther the location is from the center, the lower the charging efficiency, even beyond the effective charging range of wireless charging.
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5. Check whether the receiving device supports wireless charging
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Whether to support the QI wireless charging protocol (it is recommended to consult the equipment manufacturer), if your equipment is not QI certification, there may be compatibility problems, it is recommended to use the wireless charger with the device to charge.
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Note: QI certification is the WPC Wireless Charging Alliance (Wireless Power Consortium) recognized authorization mark, products certified by the WPC alliance can use QI certification mark.
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6. Please try using another receiving device that supports wireless charging
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Please use other receiving devices that support wireless charging (such as Mate20 pro, P30 Pro) to try wireless reverse charging. If it can be charged, there may be a problem with the receiving device.
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7. Upgrade the system version
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Please confirm whether the mobile version is the latest version:
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(1) Click Settings, enter Software updates in the search box, and click Check for Updates.
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(2) If the system returns the latest version, it means that the mobile phone system is the latest version.
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(3) If the system prompts that the new version needs to be upgraded, please upgrade the phone to the latest version.
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Tip: Upgrade system may delete data, please back up important data (QQ, wechat and other third-party applications need to be backed up separately).
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If the preceding methods do not solve the problem, back up the data (third-party applications such as QQ and wechat need to be backed up separately), bring the relevant purchase vouchers, and take the phone and charger to Huawei customer service center for testing and handling.