You can charge an older Android smartphone or accessory with a micro USB cable. A micro USB port is rectangular. Many new Android smartphones have an oval USB-C port. Be sure to check which connector you have, before you buy a cable. With these micro USB cables, you can charge your devices and transfer data from your smartphone to your computer, for example. Don't you want to buy a new cable every few months? Choose a sturdy nylon cable, because these last longer. Choose a 2m or 3m long cable for extra freedom of movement.