AFENDO 10400mAh Dual USB Portable Emergency Backup Power Bank for Tablet, Notepad, Smart Phone-Black High quality power supply: Built-in LG Lithium-ion Grade A Cells and premium chips ensure reliability and safety, supplying 500+ recharge cycles over a lifetime Ultra-high 10400mAh capacity, compatible and easy to charge most mobile phones and other 5V devices. High efficiency of power conversion: 75%-85% Package includes: 1*AFDPBSN11 power bank, 1* micro USB to USB cable,1* six-Language Manual(En/De/Fr/It/Esp/Jp), 1* Warranty Card 18 months warranty, 30 days unconditional returns &amp; exchanges , Answer to customer&#39;s queries within 24 hours (Customer Service) Smart Protection&#xFF1A;over-charge/over-discharge/over-current/ over voltage/ short circuit smart protection. Each port can intelligently identify your device to speak its unique charging language. It is compatible to any brand or model and optimizes the charging speed.