Appears to be the cheapest this has been according to camelcamelcamel where it was previously this price for a day.
I have this and it's a great piece of kit espicially for taking away. fits easily in my pockets.
PowerCore 20100 with Quick Charge 3.0
The Ultra-High-Capacity Portable Charger
From ANKER, America's Leading USB Charging Brand
• Faster and safer charging with our advanced technology
• 10 million+ happy users and counting
Unbeatable Charging Speed
Amongst the first portable chargers ever to utilize Quick Charge 3.0 output, PowerCore 20100 charges compatible devices up to 80% in just half an hour. Non-Quick Charge devices also charge at max-speed.
PowerCore 20100 packs seven iPhone charges or five Galaxy S6 charges into your bag or pocket. That's a whole week of charging without needing to plug into the wall.
30% smaller than other portable chargers of the same capacity. About the size of a TV remote and weighs less than a can of soup (12.5 oz).
MultiProtect Safety System
Surge protection, temperature control and more advanced safety features keep you and your devices safe.