While loaded with professional and convenience features, the fact that the MBX500 is battery powered is what makes it unique. In keeping with the sleek profile of its extruded aluminum alloy housing, the exchangeable Lithium-ion battery plugs flush into the rear control panel as if it were part of the panel. A 3.0 hour charge will give you 220 full power flashes and thousands of minimum power flashes. What’s remarkable about the MBX500 is that it recycles in only 2.5 seconds to full power and is capable of 5 minimum power flashes per second, without extending the recycling time as the battery depletes. If you need to stop action the MBX500 offers very short flash durations of 1/15,000 to 1/4,500 sec.