The Photogenic ION Lithium-ion Pure Sine Wave Inverter System with Spare Battery allows you to take your studio strobes on the road or off the road without electricity and without noisy generators or bulky old-style inverters. Weighing in at only 3.5 lb including its battery, the ION measures only 7.5 x 4.4 x 3.3" but is able to deliver hundreds or even thousands of full power flashes depending on the flash head in use. For example, Photogenic's 1,000W/s PL1000DR gets 300 full power flashes on a fully charged battery while their AKC160 will get a whopping 2,050 flashes from the same battery. Photogenic doubles that capacity by including a spare battery but you can triple or quadruple your capacity by simply purchasing extra batteries which can be charged apart from the inverter. Extra chargers are available to charge more than 1 battery concurrently.Convenience features include a USB port to power computers and other electronic devices and an LED "fuel gauge" that allows you to check on remaining power at a glance. The system includes the ION Inverter, battery, charger, light stand clamp and strap.