CallOne Power Bank 26000mAh you can use if you are travelling, this device is important for you as it will enable you to carry your data with you. It is fit for various mobile phones and devices. -Fit For Various Mobile Phone & Devices. Compact & Heavy Duty. Fast And Proper Charging. IC Controlled Output. Important Companion For Travellers. Max current output including all 3 output ports = 2.1-2.4A Charge Time: ~15.5h (with 2.1A Charger) It can charge 2 devices simultaneously. Being a high capacity power bank, it is suggested to use 2.1A adapter/charger to charge it. If 1A or lower charger is used, the time taken to charge the power bank could be long.