PolyTac X USB - includes 18650 battery - Box - Yellow Super Bright, Multi-Fuel, 600 Lumen Tactical Flashlight The 600 lumen PolyTac X is available two ways: The PolyTac X USB is a complete rechargeable system that includes our new 18650 USB battery with an integrated USB charge port. The PolyTac X includes two CR123A lithium batteries. Both feature MULTI-FUEL innovation that allows them to accept Streamlight’s 18650 USB battery or CR123A lithium batteries, ensuring you’ll always have a beam when you need it.