(under subclass 101) Subject matter including means for regulating only the flow of charging current in series between the charging source and the load (i.e., the means for regulating is absent any means to bypass charging current around the load).
SEE OR SEARCH THIS CLASS, SUBCLASS:
128, for battery charging and discharging.
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136, Batteries: Thermoelectric and Photoelectric
291+, for applications of photoelectric batteries.
307, Electrical Transmission or Interconnection Systems, 46, 64, and 66 for batteries being used as emergency sources.
323, Electricity: Power Supply or Regulation Systems,