Key Features A Superior Portable Power Station Premium LGBattery Cell, higher Power Density, 30% Extra Capacity 20100m Ah Extra Capacity Dual Flexible Output Ports Ultra Fast Charging & Recharging Speed More Powerful, Premium LGBattery Cell All rechargeable batteries have a limited lifespan & the available capacity is to diminish in the cold weather. Benefiting from advanced battery technology of superior LGbattery cells, Ally series power banks reduce the self-aging helping to maximize the lifespan of power bank, & retain more available capacity in cold season. One Is Enough TL-PB20100 is an enormous capacity 20100m Ah power bank from Ally series. The extra capacity working together with high energy efficiency, delivers more power & charges more times for all your devices. A TL-PB20100 carries enough power for most circumstance, even a long trip or a family gathering. Dual Flexible Output Ports Powered by TP-LINK Smart Charging technology, both output ports of TL-PB20100 can intelligently adjust the charging power subject to the connected devices. These flexible output ports are designed to be capable of delivering ultra fast charging power for devices with large battery like tablets, & also capable of delivering safe & minimal charging power for gadgets with tiny battery like smart wearable devices.