Amazon via AnkerDirect is offering the Astro E4 13000mAh portable high capacity power bank for $39 with free shipping when you enter code ANKERE4B at checkout. That is a total savings of 22% off retail and the lowest price ever recorded. Deal is only valid on the black model.
The large capacity of this power bank allows it to completely recharge an iPhone around 6 times and provide a boost of about 80% to an iPad. It features 4 status LEDs that display power availability, over 500 lifetime recharge cycles, and a slim form factor measuring just .9 inches thick. Perfect during power outages, the Astro E4 will keep all your gadgets running and light the way thanks to a built-in flashlight.
Nearly 625 Amazon reviewers rate it 4.5 out of 5 stars.