The Dual L-Series to V-Mount Adapter from IndiPRO Tools allows you to use two L-Series batteries on devices that have a V-Mount plate. Both L-Series batteries must be used at the same time, because only when combined do their voltages equal that of a V-Mount battery. The adapter also features a 2.5mm DC output that provides unregulated 14.4V, for powering an accessory at the same time as your main device. Generally, two NP-F970 L-Series batteries together provide approximately 95Wh of power. LED indicators on the adapter confirm the capacity level of each L-Series battery. Batteries are sold separately.