Profoto MkII lithium-ion battery is designed for Profoto B1 and B1X portable flash units. Provides up to 325 full-power flashes (500 J), or up to tens of thousands of lower-power flashes, with a 2.5-hour charge using the 2.8A charger. The 4.5A fast charger reduces this time to 1.5 hours. LED indicators on the battery and the charger allow monitoring the charging process. Battery dimensions: 8.5×10.5×6.7 cm, weight: 0.54 kg. Voltage 14.8 V, capacity 3 Ah (44.4 Wh). Operating temperatures: charging 0°C to +45°C, discharging -10°C to +50°C.