Mobile power bank 4000mAh 1. Our patented product 2. 4000mAh capacity. 3. high transfer ... , top grade and with prevent scratch function. Product Specification:Battery Cell Type:Lithium-ion polymer battery ... battery charger is compatible with be charged product. Prohibit disassemble product, nearby high temperature or throw into ... 1,2,3,4 circularly light on. After unit full charged, LED1,2,3,4 light off ...