Features Anti-Slip Design for Easy Grip Scratch-Resistant, Anti-Slip, Flame-Resistant. 5.8mm narrow-edge design fits hand shape The edge is thin to 5.8mm, and 8.72mm body forming a narrow curvature narrow-edge which fits hand shape. 113grams at featherweight level and 20cm standard data lines, which is more convenient to hand-holding and charging. High density lithium polymer batteries Using the original lithium polymer batteries from the ATL / force suppliers, and plate side conversion rate is up to 93%. Advanced circuit chip effectively enhances the charging conversion rate, additionally stabilize discharge voltage enable you double reassurance of charging. Nine layers of world-class circuit chip protection With adopted USB smart-control chips and charging/discharging chips, Mi Power Bank not only provides nine layers of circuit chip protection. It also enhances charging efficiency. Intelligent chip, which can automatically identifies charging equipment Built-in adaptive smart chip can automatically identify the charging device demands to adjust the output mods such as 5V / 2A 9V / 1.2A 12V / 1A, etc. And it is compatible with mainstream mobile phones.