https://electronics.woot.com/offers/multipacks-otterbox-20w-usb-c-wall-charger-bulk-packaging 20W OtterBox Fast Charging USB-C Wall Charger (Bulk Packaging) on sale from $5.99. Shipping is free for Amazon Prime Members (must login with your Amazon account and select a shipping address in order for Woot to apply free shipping) or is otherwise $6 per order.