When you plug your iOS device into a power source or set it on a Qi-enabled wireless charger, be it an iPhone or and iPad, you’ll usually hear a charging chime so long as the device isn’t configured to be in silent mode.
Apple doesn’t provide you with a way to change your handset’s charging chime out of the box, but a new jailbreak tweak called Bezon by iOS developer DevelopApple can help in this department.