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BQ77915: Curious parts from evaluation module

Part Number: BQ77915

Hi team.

I am developing BMS and consider using 'bq77915' one of my consider list.

Below is when I analyze 'bq77915 evaluation board cirquit', there are two parts that can not find information. 

Please give me information about that(NT1,E1).

I wonder what it is.

Thank you.