44b - Transportable Power Sources: Batteries

Abstract

The current consumption of the latest camcorder combinations is as low as 2–2.5 A with all functions operating. The total current drain at 12 V is approximately 10–10.5 A, including lighting with a power of 100 W. In the ENG situation, all the equipment weight is generally borne on the shoulder of the camera operator and due consideration must be given to balance and to keeping the weight of the battery to a minimum consistent with reasonable capacity. Battery manufacturers have devoted effort to the problems of increased running times and methods of attaching larger batteries to the camera systems currently available. The leaders in this field are Anton Bauer and PAG. There are many chargers on the market to cover the overnight or 14 h rate charging requirement. Many users are content with 14 h charging at the C/10 rate, but the broadcast and professional video markets are increasingly converting to fast charging. Slow charging is simple and reliable as no sophisticated control is needed over the point of charge termination. Because the charge is normally confined to the C/10 rate, there is little chance of battery damage through excessive overcharge unless batteries are left connected for periods well in excess of 24 h.