Bestbuy offers Rocketfish™ - USB-C Mobile Power Kit For Nintendo Switch, Switch OLED & Switch Lite - Black for $9.99 (orig. $19.99) + free shipping for  My Best Buy Rewards members (free to join).

Product Description:
Recharge your Nintendo Switch, Switch OLED or Switch Lite gaming consoles anywhere with this Rocketfish Mobile Power Kit for Nintendo Switch, Switch OLED and Switch Lite. The AC power adapter connects to a wall plug, and the USB car charger provides convenient charging in a vehicle. This power kit includes a 6.5-foot USB-C cable to connect your Switch console for charging while you continue playing. This power kit includes short-circuit protection and overload protection for safe charging and ultimate protection for your device.