27/03/2026
Hi everyone,
Today we’re putting a 24 Volt 40 Ampere Hour lithium iron phosphate (LiFePO₄) battery to the test using the CDM Battery Tester. Our goal? To find out its actual remaining capacity.
Here’s how we set it up:
First, configured the charging current and charge cut-off voltage
Then, set the discharge current and discharge cut-off voltage
After that, simply started the test
Because this battery pack has a relatively large capacity, the test took several hours to complete. Once finished, the results were clear:
The measured capacity came in at around 26 Ampere Hour to 27 Ampere Hour – roughly 70% of its original rating.
But that’s not all. After completing the test, the CDM tester automatically fully charged and balanced the battery pack. You can see from the final readings that all individual cells are now well balanced, with consistent voltages across the pack.
Whether you’re testing used cells or evaluating aging packs, the CDM Battery Tester delivers accurate results and takes care of the rest – so you can make informed decisions with confidence.