Can you iphone get power back without charging?

Omg my phone ran out of power today after a hour or 2 i checked back it was like 5% i was like wth --""

No you have to charge it to get the power back.

Yet if you let the battery sit for a while it can gather a small amount of power back, its not going to give you power back endlessly or a lot back but I think you can 3% total back if you wait long enough.

How do you expect that to happen?

To maximize your phone battery life. Dim the brightness to the lowest point. Turn off your Bluetooth, because you probably do not use that. And if you are using 4.0+ iPhone IOS. Delete your application history.