The Dracast 90Wh 14.8V Li-Ion V-Mount Battery is a memory-effect-free battery for professional camera systems. It features built-in electronics to protect the battery during charging and use, charger is not included with the battery. The 5-LED battery system provides an indicator that shows you how much capacity the battery has left before it needs to be charged. It incorporates a D-tap power outlet, so you can power accessories directly, instead of through your camera's electronics. With an operating temperature range of -4 to 122 Degree F, the battery will keep working even in deep cold and extreme heat. 90Wh Li-ion professional mount battery pack does not suffer from memory effect, common to NiCad batteries. Fits camera and lighting units with V-Mount battery bracket. The built-in LED battery gauge provides you with a clear visual confirmation of the battery's capacity. The built-in D-tap connector allows you to power accessories directly from the battery, protecting your camera's electronics from potential damage due to power hungry accessories. The battery incorporates electronic protection from over-charging, over-discharging, over-current-draw, external short-circuits, and non-equilibrium between its power cells. The battery will operate in temperature extremes that are uncomfortable for most people. Please note that as a general rule, battery capacity decreases as the temperature gets colder. Check your owner's manual for instructions on charging cold or hot batteries. An attached rubber cover protects the D-tap connector when not in use.