MP3 players with USB charging

 

— the ability to charge the player's battery directly from the computer's USB port — or from a network adapter with the same connector. Such models do not require a separate charger, and if you have a laptop or other similar gadget, they can be charged even in the absence of sockets. And even the mentioned adapters are much more versatile than classic chargers: USB is a common standard, and the player can be charged regardless of what gadget the adapter was originally intended for.