New Series X controller doesn't work while charging charge and play Kit?

Xbox One accessories and peripherals will be compatible with Xbox Series X. As to whether the rechargeable battery packs are compatible with an Xbox Series X controller, that has not yet been revealed at this time, to my knowledge. However, the new controller
will use USB-C for its charging port instead of the Play & Charge Kit's Micro-USB plug.

[quote user="Lord Of Blah"]As I understand it, you're saying the battery is continuing to charge when it doesn't need to? If so, then it seems your kit is working correctly on that end. The Change and Play Kit charges while you have your 360 on, since the
flow of power from your 360 to the controller is constant. [/quote]

What happened on my previous console: If the console was on (or while I was playing) and the battery finished charging, the light would turn green. This has not happened once since getting an Xbox 360 S (and the new Play and Charge Kit).

Not via a play and charge kit. The play and charge kit simply charges the gamepad it doesn't turn it into a wired controller.

Oh I could work around it. I could charge the controller off my PC.. or I could buy a charge station, and work around it... but that of course doesn't fix the actual issue.

Does anyone else have a play and charge kit that might be able to verify? Like if you plug in your controller with the play and charge kit installed while the system is off... does the xbox turn on automatically?

The play and charge kit is just that a charge kit that allows you to play while charging. It does not turn it into a wired controller.