what type of battery is included with the yaesu ftx-1 optima for portable field use?

The Yaesu FTX-1 Optima includes a 6400mAh Li-ion battery called the SBR-52LI for portable field use. This high-capacity lithium-ion battery allows the radio to operate stand-alone at around 6W with about 8 to 9 hours of battery life, depending on the band and mode. The battery is rechargeable separately using USB Type-C PD with a 45W or greater charger, and it can be attached to the back of the Field Head for integrated field operation.