Update: The coupon code seems to be sold out, but $37 is still a solid price for this powerful power bank.
Amazon is offering the Anker Astro 3E 10000mAh portable high capacity power bank for only $33 with free shipping when you enter promotional code EV8R3TKE at checkout. That’s $67 below retail and the lowest price we have ever seen. The large capacity of this power bank allows it to completely recharge an iPhone four to five times. It features LEDs that display power availbility, four charging adapters (Lightning not included, bring your own), and a slim form factor measuring just .59 inches thick.
1,755 Amazon reviewers rate the Anker Astro 3E power bank a stellar 4.5 stars.