Batteries MWH is designed to provide the best possible performance parameters for short discharge times. It is important for applications such as UPS systems are often designed to maintain short lead times of 10-15 min. The use of batteries allows MWH in this situation to get better performance fitted to the minimization of the necessary volume to reserve under the batteries. The use of MWH in UPS s with adjustable number of batteries in series allows a reduction in their number compared to traditional batteries.