Anker may make great products, but their marketing is shit. They have way too many products and no good way to differentiate. Check out this site which tries to explain the differences:
#1 An Anker PowerCore+ powerbank is BETTER and NEWER than Astro Gen 1 or Gen 2 of same capacity.
#2 An Anker PowerCore (without the +) powerbank is BETTER and NEWER than Astro Gen 1 or Gen 2 of same capacity.
#3 Anker PowerCore+ and Anker PowerCore powerbanks exist side by side with PowerCore+ usually having some extra features while PowerCore offers excellent value for money.
http://www.powerbankguide.com/anker-powercore-vs-astro-the-d...
Let us simplify the situation for you –
#1 An Anker PowerCore+ powerbank is BETTER and NEWER than Astro Gen 1 or Gen 2 of same capacity.
#2 An Anker PowerCore (without the +) powerbank is BETTER and NEWER than Astro Gen 1 or Gen 2 of same capacity.
#3 Anker PowerCore+ and Anker PowerCore powerbanks exist side by side with PowerCore+ usually having some extra features while PowerCore offers excellent value for money.