How to enable in-camera battery charging on RX100VIIA
Instead of updating the camera with (at least) a USB-C port, Sony decided to go the cheap route and cripple the current RX100 version by removing the in-camera battery charging feature to comply with the EU regulations: https://www.reddit.com/r/RX100/comments/1irtczo/incamera_battery_charging_feature_removed_from/
User "d3xmeister" now posted a guide/files on dpreview how to enable it.
Disclaimer: I personally didn't test it, but someone in the linked thread confirms that it works fine.