Connect the battery to the device. Do a full SMC reset (for Mac) or EC reset (for PC). The first boot may show a warning, but after a full charge cycle (100% to 0% to 100%), the BMS recalibrates, and the "crack" becomes permanent.
: It adjusts the Full Charge Capacity to match the new cells' actual capacity, making the battery appear "brand new" to the laptop. battery eeprom works crack updated