Charmast 26800mAh Power Bank USB C Battery Pack Ultra Slim Design with 3 Input & 4 iSmart Output This 26800mAh power bank Capable of charging multiple phones at the same time, it features 1 USB-C bidirectional rapid charge port and 3 iSmart output, meaning it can rapidly charge 4 devices at the same timeit even has pass-through charging technology. But keep in mind that the maximum power for each one is distributed between devices when you have more than one thing plugged in. If you want the fastest charging for something like a USB-C phone that takes all of the available power, charge it alone. Charge Safer The advanced chipset used in its construction complements its overall functioning. For an impressive appearance, the rubber oil surface is highlighted with a linear pattern and matte finish which provide a firm grip.