Bestbuy offers Insignia™ - Side Dock Dual Battery Charger for Xbox Series S - White for $9.99 (orig. $19.99) with free store pickup.  Shipping is free for My Best Buy Members (free to join).

Product Description:

Ensure you always have a powered Xbox One controller with this Insignia Side Dock Battery Charging Station for Xbox Series S. Exclusively designed for the Xbox Series S console, it has two battery compartments so you can charge two controller batteries simultaneously. Includes two high-power 1200mAh battery packs compatible with Xbox controllers. LED lights inform you when the batteries are charged and ready to use. Plug any compatible USB device into the built-in USB 2.1 pass-thru USB port.