Esattamente (avvengono anche loro pultroppo)!
E non serve nemmeno la calibrazione, in realtà nn va fatta, perchè nn serve a nnt.
Google MAX17040 for more info - while our fuel gauge chip (MAX17042) does have advanced features that would require calibration if used, those features are not yet enabled and it basically behaves identically to a 17040. Maxim specifically designs their fuel gauge chips to not require special calibration procedures..