Rapid/Quick Chargers are the real deal.
When you’re using a Quick Charge device, what you are really doing is opening the door a little wider to let more power in. The regulator inside your phone only allows so much power in at a time.
Quick Charge devices allow more than your typical chargers, without damaging the battery.
Now, that means two things. First, you have to have a device that supports quick chargers in order to take advantage of the boost. It also means that you may need to buy that special charger to go with your supported device. More likely than not, all the chargers you’ve been using aren’t Quick Charge compatible, so getting the higher output charger will help.
The Potential Downside of Quick Chargers?
From a safety perspective, you don’t have to worry about blowing up your phone. You should however be aware that Quick Chargers can generate more heat.
The more power you push through a device, the more stress it puts on a battery and the more heat it generates. While Quick Charge devices are built to be safe, they can still get quite hot.