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It is not necessary to deep discharge any of the current DJI packs (phantom 3 onwards) and doing so will do nothing to calibrate the available capacity percentage. The battery monitoring circuitry does not perform simple coulomb counting, it is significantly more complex. In fact individual cells IR values are measured and tracked in real time so the fuel gauging circuitry can accurately allow for cell aging in determining usable capacity. Instantaneous and average current demand, loaded and open load voltage, temperature and IR are all measured continuously and inform the algorithm to depict very accurately the battery capacity in real time. You might like to update your article- the considerations you mention are of almost no application to current battery management SOC offered by TI and others in our DJI products and most other devices using LiION cells.
Hi withthebirds - thanks for the info. I respect your opinion but won't get into this debate at this point... people can read up, read what DJI recommends and make their minds up. One thing I'll absolutely agree with: all this stuff applies to LiPo batts (which the vast majority of DJI drones use). LiIon is a whole different matter, so drones with LiIon batts (e.g. Spark) have entirely different considerations!