At Wednesday's event, Nokia executive Kevin Shields demonstrated the wireless charging technology by placing the phone on top of a JBL music docking station, which charged it.
Wireless charging has shown up in other phones, most notably the Palm Pre of 2009.
But Nokia is making its phone compatible with an emerging standard for wireless charging, called Qi.
That means the phone can be charged by third-party devices.
The docking station also played music from the phone, even though it wasn't plugged in.
The music was transferred from the Lumia's near-field communications chip, which can connect automatically to other devices at short range.
Coupled with the right apps, NFC chips can also be used to pay for things in stores, by tapping the phone to credit-card terminals.
Image: The back of the Nokia Lumia 920.