Much like the previously mentioned Jackery Air, Anker’s new PowerCore Slim battery mimics the size and shape of a smartphone to minimize the amount of room it takes up in your pocket. Unlike the Jackery, this doesn’t come with a Lightning cable, but it is larger at 5,000mAh compared to 3,000, and cheaper too. And of course, Anker PowerCore is your favorite line of battery packs
as well.
Source: Gizmodo – Anker’s Slimmest PowerCore Packs In a 5,000mAh Battery