UGREEN PB311 10000mAh Two-Way Fast Charging Power Bank (20W) is a portable, ultra-compact external battery engineered for daily smartphone and device charging. Featuring a 10,000mAh capacity in a slim, lightweight chassis, it includes dual output ports consisting of one bidirectional USB-C port and one USB-A port. The USB-C port supports 20W Power Delivery (PD 3.0) output to rapidly charge compatible iPhones and Android smartphones, while supporting fast self-charging to quickly recharge the power bank itself. Equipped with multi-protocol support including Quick Charge (QC) and PPS