(JP9199095-A)      An electrochemical battery comprises: (a) a casing; (b) a first electrochemical cell house within the casing and comprising: (i) a first anode comprising an alkali metal electrically associated with a first anode current collector; (ii) a means for connecting the first anode current collector to an external lead; (iii) a first cathode of cathode-active material electrically associated with a first cathode current collector; (iv) a means for connecting the first cathode current collector to an external lead; and (v) an electrolyte between the first anode and cathode; and (c) a second electrochemical cell housed within the casing and comprising the same 5 components as the first cell. Also claimed are: (1) an electrochemical battery as above, in which the first cell is dischargeable independently of the second cell to provide separate and independent sources of electrical energy; (2) in a combination with an implantable medical device requiring electrical power for a monitoring function and a device-operating function, a battery comprising: (a) a medium-rate constant discharge or constant drain cell for providing low-level currents for the monitoring function; (b) a high-rate pulse discharge cell for providing high-level current for the operating function; and (c) a single case contg. both cells; and (3) a method of providing an electrochemical battery capable of simultaneous and independent discharge at both a constant discharge rate and under a current-pulse discharge application.    USE -   Partic. for implantable medical devices,    ADVANTAGE -   The battery comprises a medium rate, constant discharge cell and a high rate, pulse discharge cell within the same housing, allowing the battery to supply a low-level currents for the maintenance of electronic monitoring circuits as well as high level current during device activation. The battery can be designed to meet the drain rate and current discharge requirements of a particular application.    (EP780918-B1)      An electrochemical battery comprises: (a) a casing; (b) a first electrochemical cell house within the casing and comprising: (i) a first anode comprising an alkali metal electrically associated with a first anode current collector; (ii) a means for connecting the first anode current collector to an external lead; (iii) a first cathode of cathode-active material electrically associated with a first cathode current collector; (iv) a means for connecting the first cathode current collector to an external lead; and (v) an electrolyte between the first anode and cathode; and (c) a second electrochemical cell housed within the casing and comprising the same 5 components as the first cell. Also claimed are: (1) an electrochemical battery as above, in which the first cell is dischargeable independently of the second cell to provide separate and independent sources of electrical energy; (2) in a combination with an implantable medical device requiring electrical power for a monitoring function and a device-operating function, a battery comprising: (a) a medium-rate constant discharge or constant drain cell for providing low-level currents for the monitoring function; (b) a high-rate pulse discharge cell for providing high-level current for the operating function; and (c) a single case contg. both cells; and (3) a method of providing an electrochemical battery capable of simultaneous and independent discharge at both a constant discharge rate and under a current-pulse discharge application.    USE -   Partic. for implantable medical devices,    ADVANTAGE -   The battery comprises a medium rate, constant discharge cell and a high rate, pulse discharge cell within the same housing, allowing the battery to supply a low-level currents for the maintenance of electronic monitoring circuits as well as high level current during device activation. The battery can be designed to meet the drain rate and current discharge requirements of a particular application.