Speedotron Explorer 1500 Pack The Explorer provides up to 225 full power flashes to a single 103 Black Line Series flash head with color-corrected flashtube (not included). That number will be significantly lower when using two heads with this pack. Its battery has an integral charger that operates with any AC current from 85-265 AC Volts. It has 2 head outlets, and power may be divided asymmetrically - 1000 and 500 watt/seconds. It will power a modeling light up to 10 seconds at a time, powering off automatically, to conserve battery power (150 watts maximum recommended). Recycle time is 3.5 seconds @ full power.