Powerology Aluminum 20000mAh Power Bank - Combining a high 20000mAh battery capacity with a premium aluminum housing design, it offers both a stylish appearance and long-term energy independence. Its metallic construction helps effectively dissipate internal heat, enhancing the device`s durability. Fast charging technology and multiple output ports enable you to power different smartphones and tablets simultaneously in a parallel, safe manner and in minimum time. Its ergonomic and compact structure makes it highly convenient to carry for daily use and travel. The built-in smart microchip system fully protects connected equipment against overvoltage, overheating, and short-circuit risks.