Conveniently power up your Integra Plus, Expert D, Integra Mini, Speed Max, and other compatible monolights that consume up to 2,000 Ws, with the Hensel Power Max L. This battery is capable of providing 440 full-power flashes at 500 Ws, and charges to full power in two hours. The flash duration of the battery, when used with the separately available Speed Max flash head, is immensely short at 1/66,000th of a second. The power indicator displays the amount of power remaining in the pack, whereas the voltage indicator on the battery displays the amount of voltage present. The Hensel Power Max L comes with a metal housing and a sturdy, protective rubber profile.