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15000mAh iXCC ® Upgraded Dual USB Power Bank - Portable External Backup Battery Pack for Smartphones, MP3 Players, Tablets and More(Silver) [link]
That doesn't look like a phone at all. It looks like a thin rechargeable 8000 mAh power bank, similar to this one (but thinner). You can get those for $20 or less if you grab them at tradeshows (they're popular swag bag gifts).