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Tiitan 20000mAh Li-Polymer Power Bank

20000mAh Premium Quality lithium-Polymer battery Up to 72 hours extra of talk or surf time (hours of time and number of charges are estimated by comparing the iPhone 7 internal batteries specification on apple to the internal batteries of Tiitan Power bank; Results will vary by device and conditions) Dual charge technology for simultaneous charge of the power bank and a phone or other USB-powered device Up to 3-4 charges for Smartphone (hours of time and number of charges are estimated by comparing the Smartphone internal batteries specification;