Dual USB ports and premium Li-ion battery cells encased in a sleek aluminium casing Super-sized 16000 mAh capacityPremium Li-ion battery cells from reputable suppliers such as LG and Panasonic, with energy densities up to 725Wh/L, add an extra 16000 mAh of battery life to your smartphone, tablet or digital camera. Supports up to 3.5 full charges on Redmi Note 4G (3100mAh). Compatible with a wide range of devicesMi Power Bank automatically adjusts its output level based on the connected device. It is compatible with smartphones and tablets from Mi, Apple, Samsung, HTC, Google and BlackBerry, as well as a variety of digital cameras and handheld gaming devices. Nine layers of circuit protection, built by Texas InstrumentsMi Power Bank's adopted USB smart-control and charging/discharging chips from Texas Instruments provide nine layers of circuit chip protection while enhancing efficiency. Up to 93% conversion rateWorld-class chips not only are safer, but also improve charging conversion rate and stabilize discharging voltage with advanced resistance-capacitance sensors to optimize efficiency and durability. Beautifully textured aluminum surfaceMade from a single piece of aluminum, each casing is formed by high-precision CNC digital cutting. The water and corrosion-resistant surface is rigidly designed for everyday use. It has also been tested to withstand up to 2,000 pressure impacts.

• Capacity: 16,000mAh
• Aluminium alloy power bank
• All aluminum alloy shell surface,circular arc edge and anodic oxidation technological design
• Feature the indicator to show when it's charging
• Comprehensive optimization of charging and discharging efficiency