20,000mAh 30W Zolo Portable Charger with Integrated Lanyard USB-C Cable for Travel, Quick Charging Battery Pack in Black: Anker A1689 Zolo With a built-in USB-C cable, a 20,000mAh battery pack, and a 30W high-speed portable charger, the Anker Zolo Power Bank It's important to note that Does a slow charging speed occur frequently? The charger and cable's ability to meet the power bank's requirements determines the charging speed.