The Broncolor Mobil A2L power pack is 1200 watt second two head outlet battery operated strobe pack. It is lightweight and compact - ideal for outdoor shootings and very convenient to carry along. The special locking device and the ejector spring let you replace the rechargeable battery in no time at all. The Life battery of the Mobil A2L has no memory effect and can be used in any orientation. When you replace the battery, the power pack settings are retained for a short period of time.