Promaster 90091 Li-ion Battery for Leica BP-SCL6 Monolight Batteries you can connect the TT685II

you can connect the TT685II with an external Lithium-Ion power pack as PB960 to boost the flash performance for more possibilities

and with RAW Burst Mode with ½ second pre-shooting

or increase torque when slow

Built-in USB-C charging port

Promaster 90091 Li-ion Battery for Leica BP-SCL6 Monolight Batteries you can connect the TT685IIThis battery replaces the Leica BP SCL6 battery. It has a capacity of 2,470 mAh. See the specifications for more information and compatibility. ProMaster batteries are a high quality, long lasting power source for your camera. Heres what makes ProMaster batteries stand out: Premium components. Battery components are produced in a range of quality levels. Some are excellent, and others are frankly sub par. ProMaster batteries use the best quality cells