The dualsense will use an internal battery, similar to how the Dualshock 3 and 4 had internal batteries. They can be removed but it will require you to take the controller apart in order to do this which could void the warranty.
PlayStation 5 is an upcoming game console by Sony and is being released as the successor to the Playstation 4. The console is set to release in the holiday season of 2020
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Will the Platinum and Gold Wireless Headsets for the PS4 work with the PS5? View Answer