Listed as £10.99, but I found a £3 discount code "JACKERYP" bringing it to £7.99!
I've got one - Excellent little charger. Bargain at this price.
Jackery Pop 5200mAh Dual USB 2.1A Output Portable Charger (Panasonic Cell )External Battery Pack - Portable Battery & Travel Chargers for iPhone, iPad , Samsung, Tablet and Android Smart Devices
2.1 A OUTPUT AND 2A INPUT: 2A input can be 2 times faster to fully charge the 5200mAh portable charger ( please use a 2A or higher output charger); 2.4A output makes it charge other devices 2X faster than other chargers. The maximum input and output for the fastest and strongest charging experience.
Exclusive Smartfit Technology: With the Dual USB Port , Up to 2.1A Max with per port, it Charge 2 times faster and smarter than others, automatically detects and delivers the optimal charging current for any connected device- ensuring the fastest and most efficient charge.
ADVANCED POWER BANK: Panasonic grade A Li-ion polymer cell and premium microchips create high-quality portable charger; Premium aluminum case; Secured battery safety with 4 layers of smart safety protection circuit; Advanced power lock.
COMPACT PORTABLE CHARGER: The world's smallest external battery travel charger is stylish and compact to easily fit in your bag for instant power to smartphones and tablets.
Package Content :Jackery Pop External Battery*1, premium Micro USB Cable*1 , User Guide*1, 18 month Warranty Card*1.