HBNS Stylish Mobile Phone Charger 20800mAh Power Bank Suitable for all Smartphones. Due to the large capacity, it takes almost 2 to 4 hours before it gets fully charged but once it is full you can safely use it for a few days. The charging speed also depends on the charger. We tested it with a charger that can supply 1.2A (amps). If you use it with a charger that can supply 2A or more, it will charge faster. Convenient and portable: The latest Lionix Electric Charger Power Bank has a stylish and simple design for everyday use, travel, camping or hiking, emergencies, commuters and families.