The circuit operates at a supply voltage as low as 4V with less than 1-mV output variation and provides an output accuracy of 3%. The circuit accommodates a battery-under-test voltage range of 0.9 to ...

The battery will have just 80% of a full load current. Instead, you can use the circuit in Figure 1 to produce a constant-current load. Figure 1 A tester of AA- or AAA-sized batteries uses ...