The phrase "easy charging" means that the process of replenishing or refilling a device or object with energy or power is simple and not difficult to do. Full definition
If you read on a tablet, consider a spot near an outlet for easy charging. (bhg.com)
Battery life is adequate in an era where everyone has easy charging access. (tomsguide.com)
Inside are two 12V DC power outlets for easy charging of electronic devices, and optional Bluetooth compatibility for making hands - free phone calls. (palmenmotors.com)