Answer: Device cradles offer a multifunctional solution, serving as not only chargers but also radio communication interfaces and host communication interfaces. For example, when a scanner is paired with a cradle, it transmits scanned barcode data to the cradle via Bluetooth. The cradle, in turn, connects to the host via a cabled connection (such as USB) and efficiently routes the received data into the host system. In contrast, battery cradles typically do not possess these communication capabilities.