You can charge your devices or connect them to a laptop with a USB cable. Check which connection your smartphone has before you buy a cable. All iPhone devices and most iPad models have an Apple Lightning connector. Most Android smartphones have a USB-C port. Older Android smartphones still have a micro USB port. It's angular instead of oval, like USB-C. Keep in mind that more and more chargers have a USB-C port instead of a rectangular USB-A port. To use it, you need a cable with a USB-C connection on one side and a USB-C or Lightning connection on the other. Choose a sturdy nylon or Kevlar cable if you want your cable to last.