We had known for some time that Samsung would be launching a new portable battery pack with the Galaxy S8 and Galaxy S8+, and that battery pack is now available for sale, at least in the US. The new battery pack has a 5,100 mAh capacity; according to Samsung, it “provides up to 2 full charges from 0-100% on most of the latest smartphones,” which is a standard claim for most portable chargers of a similar size.
The battery pack has a USB Type-C port and a standard USB port (the latter is for charging the pack itself), with a USB Type-C to microUSB converter bundled in the box for devices with the older generation port. There's support for fast charging on devices that have fast charge support, while regular devices will get a standard 2A output. The battery pack has a strap for easy handling, and Samsung is offering it in silver and navy blue color options.
The battery pack is priced at $59.99 and can be purchased from Samsung's website or from Amazon.