The USB-C chargers get you just over 50 percent in half an hour, and fully charge the phone in just under two hours. The 12W Apple adapter is only about 20 minutes behind. ... It's much faster than the 5W adapter, works with all iPhones, and doesn't require a new cable. Apple 12W USB Power Adapter. ... Use this USB-based power adapter to charge your iPhone, iPad, or iPod with a Lightning connector at home, on the road, or whenever it's not connected to a computer. Compact and convenient. You can connect the adapter directly to your device via the Lightning connector.