Electrical and mechanical aspects may focus on the cell capacity of the battery pack by figuring out the discharge and charge rate. Another consideration involves how the batteries are configured in the pack, such as parallel or in a series, and how each cell will be connected internally in the pack. Other things to consider will. There are many different types of test fixtures used based on the battery pack, what tests will be performed, and other factors. Three common types of testers are manual, electronic, and automated. Example of a custom battery pack test fixture. Manual. While testing circuitry is usually done once the printed circuit boardis complete, the BMS software and hardware testing are performed when the pack is assembled. The battery pack is cycled. When obtaining custom production test fixtures, the timeline for the test fixture will be unique to each customer based on the size of the battery pack,. Test fixtures are developed to test how the battery packs operate in a controlled, simulated process. This testing allows for further programming of electrical systems as well as calibration. Keep in mind that testing does not just happen once during the development and.