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Its support for batteries like the SS03XL and CD03XL with the BQ40Z551 TI V1.05 chip does not allow modifications to the FCC
Topic starter
Posted : 09/06/2026 12:02 pm
Yes, correct.
bq40z551 chip has latest Impedance Tracking technology which does not allow FCC change by the user.
Instead, chip computes FCC by itself basing on cells condition, load value, ambient parameters and so on.
User no longer need to care about FCC. Chip is smart enough to compute it correctly after full relearning cycle.
Posted : 09/06/2026 12:28 pm