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BQ27426: How to use other CHEM ID and how the data be saved in ROM base gauge

Kailun Liu
Expert 3123 points
Part Number: BQ27426
Other Parts Discussed in Thread: BQ27Z746, BQ27Z561

Hi,

BQ27426  is a ROM base gauge, it can only use the data been saved in ROM.  There are three common CHEM ID in BQ27426.

1. If I want to use  my own BAT's CHEM ID, is there any way to download my BAT'S CHEM ID in the gauge? 

2. If I can use RAM to store the CHEM ID of my BAT, does it mean that the data in RAM will be lost when power-off? Is there a solution to avoid this situation?

3. For other gauges（BQ27Z561,BQ27Z746), I can export the GG file after doing golden learning, modify it, and then write the file into flash memory. For BQ27Z426, Can this action be done too? If so, is the data stored in RAM？ 

Thanks！