CELL4LESS Replacement Back Glass Cover Back Battery Door w/Custom Removal Tool & Pre-Installed Adhesive for Samsung Galaxy S8 Plus OEM - All Models G955-2 Logo - OEM Replacement (Midnight Black) : Amazon.ca:
High Capacity 5040mAh Replace Battery f Samsung Galaxy S8 Active SM-G892A Phones | eBay
Galaxy S8 Battery Case, Punkcase 5000mAH Charger Case W/ Screen Protector | Integrated Kickstand & USB Port | IntelSwitch | Slim, Secure and Reliable | Suitable for Samsung Galaxy S8 [Black] – punkcase