Duracell Power Bank 6700 mAh, External Battery Pack for Smartphones and USB-Powered Devices, Compatible with iPhone, Samsung: Amazon.co.uk: Electronics & Photo
Duracell Power Bank 10050 mAh, Portable Charger with USB C + Fast Charging IN / OUT (18W Power Delivery and Quick Charge 3.0) for iPhone, Samsung and any USB-Powered Devices: Amazon.co.uk: Electronics