Magnet Micro USB Keychain. The Magnet Micro USB Keychain is the most convenient and compact charging cable in the industry. The magnetic closure allows you to easily snap it onto your keyring and carry it with you wherever you go. So you will always be able to charge your device wherever you are. The cord is tangle free and flexible, which allows you to comfortably use your phone while you are charging. The Magnetic Micro USB charger is compatible with Android smartphones and devices that contain a Micro USB port. ABS Plastic. 6.