1. Factory Certification: ISO9001 certification. 2. Profession: Our factory has 8 years experience in the line of power bank field. 3. High Quality: Real capacity, new A++ battery, IC protection PCBA, strictly QC tested, through 3 times Aging test before delivery. 4. OEM: Welcome OEM/ODM project. 5. Warranty: 12 months(Aritifical damages are not included).