Standby battery systems have been an essential part of modern life for many years. Initially used to support the telephone system by the Bell Telephone Company they have now become necessary in virtually every walk of life. Batteries are used in series strings to provide a matching voltage with the load and they can be connected in parallel to provide the necessary capacity for the required backup time. Because they provide emergency power to critical equipment it must be assured that their batteries are maintained at full charge. This is done by continuous charging at a constant voltage, a process called float charging.
展开▼
