powershare Reverse wireless charging should be used sparingly. Here's why.

[Handroid7]

Reverse wireless charging (also known as PowerShare) can be useful in emergency situations, but it has this problem.

 

I suggest you to save it up for emergency situations. Just bring a power bank. 

[RadiatingLight]

Quite a biased website, but it is true that reverse wireless charging is very inefficient. Phone to phone charging is dumb and will take like 4 hours. However, charging a watch or earbuds (which is what Samsung advertises it for) is much better and doesn't use up too much of the phone's battery.

[Handroid7]

26 minutes ago, RadiatingLight said:

Quite a biased website

That article is about the benefits of user-replaceable batteries.

Feel free to write an article about the benefits of non-user-replaceable batteries.

 

27 minutes ago, RadiatingLight said:

However, charging a watch or earbuds (which is what Samsung advertises it for) is much better and doesn't use up too much of the phone's battery

Also mentioned in that article.