Slim & ergonomic body with simple & stylish design.? 6700 mAh capacity battery for daily power supply & short-term travelling, but still only perfume-bottle sized body for easy portability. Compliance with aviation management standards to follow you into planes.?Premium 18650 lithium-ion battery cell, high power output efficiency.?Matt surface with 3D engraved stripe texture coated by high-quality rubber paint for better comfort and grip.