A:AnswerPower A sells a 2-pack of green batteries which come with the 4 back panels again. I believe it's called the Power A Play and Charge Kit. It says the batteries work with all Power A chargers for the Xbox One and Series X/S. The batteries are the same power as these and come with the back panels for both types of controllers. I have not tried it myself, but according to the description it should work.
