Armytek Handy C4 ProPortable Charger with Built In Power Bank Charge more, faster, with the Handy C4 Pro, a smart, portable charger that holds up to four batteries while doubling as a power bank for phones, tablets, and other USB devices. With 2. 5 A output, its ideal for field use, travel, or daily power management. Featuring an intelligent Powerbank Management System, the C4 Pro automatically detects battery type, charge level, and optimal current for efficient, safe