Because this way, I (or my SO) doesn't have to unscrew the enclosure to get at the batteries. Usually, the batteries die, while the boy is in the middle of an a

Because this way, I (or my SO) doesn't have to unscrew the enclosure to get at the batteries. Usually, the batteries die, while the boy is in the middle of an audiobook. This way, we simply plug in a USB-C cable and everything keeps going.