Noticed this code on amazon, seems pretty good:
You can get a free Astro Mini when you purchase the 2nd Gen Astro E5. I already have an anker 12000 (i think the newer version is 12800) but I wanted an upgrade to this new series for a while so I thought I would bite the bullet..
Doubt you would need both a 16000 and a 3000 so at christmas time probably a good gift idea for people - i feel as though screen protectors and external batteries are really awesome things but are things that people don't want to buy for themselves and would rather be bought!!
Anker 2nd Gen Astro E5 16000mAh External Battery with PowerIQ™ Technologyhttp://www.amazon.co.uk/gp/product/B00D5T3QK4
Anker Astro Mini 3200mAh External Battery with PowerIQ™ Technology
£42.98 - £12.99 coupon (QESR2RPC) = £29.99
"Enter code QESR2RPC at checkout to get a FREE Astro Mini."
The astro mini is popular on HUKD at normally 10£ but still getting another 1 for free is decent