If you are calling your family, your mobile phone has run out of power, how distressed it is! T-CORE can charge your phone 5 times, providing extra 50 hours of talk times. It must be a burden to carry a heavy power bank!! However T-CORE only weighs 6.2oz, lighter than 90% other power banks in the market. You won't like a brick-like power bank. Even if you put it in your bag, what if it crumple the file? We�ve developed the smallest external battery that is only half the normal size of a phone, easily put it in your pocket If the charging speed is as slow as a sloth, you may want to drop your cell phone; luckily T-CORE provides 2.1 amp output, to full charge your phone within 60 min. It can support 2 USB output at a time,and use iPhone,Type-c or Micro cable to input. Polymer cell with Aluminum alloy shell, there is no other design more safer than this. The backing and surface are curved for beauty, no expanding. Our power banks assure your safety use with its CE certification. And what's more,our 24-month friendly customer service.