iPhone 15 series, some mobile batteries are not charging properly. Reverse charging feature may be the cause.

Apple has equipped all iPhone 15 series models this year with a USB-C port, allowing the use of USB-C cables and USB-C compatible mobile batteries. However, several users have reported that some mobile batteries are not working properly.

These are voices from the major message board Reddit and the MacRurmos message board. They are about not being able to charge the iPhone 15 or “trying to charge from the iPhone 15 to the mobile battery”. It is assumed that this is probably caused by the reverse charging function on the iPhone side (supplying power from the phone to other devices).

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