My lithium cell capacity tester uses two 7 ohm, 5W ceramic resistors in parallel, effectively 3.5 ohm.
It should ideally consume 1A of current to measure capacity.
But as the voltage of the cell decreases, the current passing through the cell also decreases, leading to incorrect capacity being measured.
Is there a way to make an active load that consumes 1A irrespective of the cell voltage? I don’t need anything fancy with adjustable knobs and other things. Just need a direct replacement for the two resistors in parallel.
Claran Martis Ravi Pujar Abhi Verma Sai Prasad Jibin Lukose John Rodrigues Josh Pinkley
Lithium cell capacity tester