Cygnett ChargeUp Boost 10K Powerbank - Black The ChargeUp Boost 10K is the perfect portable power solution for your smartphone device. Featuring the latest in Lithium Polymer Battery technology, the ChargeUp Boost 5K Portable Power Bank provides power at your fingertips for when you need it most. Features SmartChip technology for fast charging, 2.4A dual USB-A output ports, extensive safety features including over-current, over-voltage, over-temperature and short circuit protection and a digital display showing the amount of charge.