Wireless chargers are convenient in many ways: Not only do they spare you the need to attach a cable to your phone, they're also handy if you have multiple devices with different ports. Samsung's dual wireless chargers take this amenity to the next level, as they can charge two devices wirelessly at the same time using a single cable. You can snatch them at a discount, as the Qi Wireless Charger Duo and Wireless Charger Duo Pad, which features Fast Charge 2.0, are down to $50 and $70, respectively.