The Rolux RL-65S is a large capacity lithium-ion battery with long standby time, great build quality and act great as a counterweight. 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.