You can charge your iPhone anywhere with an Apple iPhone power bank. Choose a power bank for iPhone with Power Delivery if you want to fast charge your devices. After 30 minutes of charging, the battery is about 50% full. Go for a 20,000mAh capacity if you want to fully charge your iPhone 4 times, or get a smaller 10,000mAh Apple power bank and fully charge your iPhone twice. Have an iPhone 14 or an older model? You need a separate Lightning cable. You can connect your iPhone 15 or newer with the USB-C cable that's usually included with the power bank.