Advanced technology that allows on-line discharge testing of VRLA or conventional cells and is invisible to the load

The technology to discharge an online string of battery cells was described by the author (see ibid., p.138-140, 1990) and by M. Walpow (see ibid., p.551-2, 1990). A brief description of both papers is repeated as background information. The technology described, allows for the online discharge test of a battery string without either endangering in anyway the served systems operation, or disconnecting the string being tested from the load it serves as an emergency back-up source