Yet another patent filed by Sony has surfaced and this one is rather like the recently released Dualshock 4 back buttons adaptor. The patent includes back buttons but also has a large slab on the base which can be used for wireless charging.
A wireless charging adapter that can snap onto a computer game controller can be inductively coupled to a charging base to wirelessly recharge a battery in the controller. The adapter also can include keys that mirror keys on the controller so that a gamer can remove the adapter with controller from the charging base, keep the adapter on the controller, and use both the controller keys and adapter keys to control a computer game.
The charging base has a flat mat-like surface on which the adapter is positioned to charge the battery. If desired, the adapter can be electrically engaged with the electrical component in the controller housing through at least one electrical wire engaged with an input/output port such as a universal serial bus (USB) port or extension port on the game controller.