Measuring the latter allows a constant power load mode (as power = current * voltage). In his article, [Kerry] shows that he can simulate a load of up to 200W.

The sink-current generator comprising IC2A and Q3 loads the battery under test, and the resistor-divider network sets the comparator voltages. You can add an optional self-testing button for checking ...

You can alternatively use the simple dual constant-current-load design in Figure 1, which you can build with inexpensive, common parts. The load current passes through a MOSFET and a 1%, 1Ω sense ...

Like other constant current sources, the Re:load uses an opamp to control a pass element. While most constant current loads will just use a transistor, [Nick] opted for a BTS117 smart low side ...

Unlike conventional resistive loads, the "dummy load" maintains a constant but adjustable load current for voltages in the range of 1.2 to 50 V.