Be careful with those --- the cable is lying to the phone about whether the thing you've plugged it into is a fast charger or not, so if it's not, you can end u

Be careful with those --- the cable is lying to the phone about whether the thing you've plugged it into is a fast charger or not, so if it's not, you can end up drawing way more current than it's rated for. A well designed USB charger will just shut down if this happens. A non well designed USB charger is another matter.