Glossary · Battery and charging
Reverse charging
With reverse charging, a smartphone gives off power instead of taking it in. This lets you charge headphones, a watch, or a second phone from your own device.
What does Reverse charging mean?
There are two types. Wirelessly, you place the second device on the back of the smartphone. With a cable, you connect the two devices via USB-C.
The power is low, so it is only suitable for charging a whole phone in an emergency. For headphones or a smartwatch on the go, it is handy. Manufacturers give the feature their own names; Samsung, for example, calls the wireless version Wireless PowerShare.
A general explanation of the term, not from a video. How it plays out on a specific device in everyday use is covered in the reviews below.
