<Li> Telecommunication plant power (wired and cellular mobile) use a − 48 volt DC battery supply </Li> <Li> Electric Utility electrical substations continue to use a 125 volt DC "Station Battery" to operate control equipment </Li> <Li> Uninterruptible power supply (UPS) for computer systems </Li> <Li> Utility - scale battery systems </Li>

When did the war of the currents end