If you're looking to purchase an AirPods charging case separately from the AirPods themselves, you have a few options:

Official Apple Store: You can buy an official AirPods charging case directly from the Apple Store, either online or at a adjustable ipad stand physical retail location. This ensures compatibility and authenticity.

Authorized Apple Resellers: Many authorized Apple resellers, such as Best Buy, Target, and Walmart, carry genuine Apple accessories, including AirPods charging cases.

Online Retailers: Websites like Amazon, eBay, and Newegg often have a wide selection of AirPods charging cases available from cell phone accessories various sellers. Be sure to check reviews and seller ratings to ensure you're purchasing a genuine product.

Third-party Brands: Some third-party brands also offer AirPods charging cases that are compatible with Apple's AirPods. These may be available at electronics stores or online retailers. Popular third-party brands include elago, Spigen, and Mophie.

When purchasing an AirPods charging case, make sure it's compatible with your specific AirPods model (whether it's the mobile tablet laptop accessories standard AirPods or AirPods Pro). Additionally, consider factors such as build quality, warranty, and customer reviews to ensure you're getting a reliable product.