... high effective power manage technology, which is safe and stable.3, it's good charging way for business trip, traveling , ... designed make it looks more attractive.8, Using the polymer lithium batteries, long lifespan, and more safety.9, Auto power off, ... Circuit Protection√Over Charge Protection√Over Discharge Protection√WarrantyOne yearRMA0.3%-0.5%Other color you can choose Black and whiteothers8 ...