The Rolux RL-2KS is a large capacity lithium-ion V-Lock mount battery charger, great build quality and can carry up to 2 batteries. Rolux are well known for their fantastic quality. They have been in the battery industry for over 10 years, producing a range of products from V-mount batteries to Canon 5d battery plates. Because their batteries are so well sought after, they OEM (create unbranded versions of their products) for large brands including Zacuto, Shape, iKan and Cineroid, so its clear that these batteries are well respected as a fantastic and reliable battery solution.