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BQ76940: Mosfets getting much hotter than expected

Part Number: BQ76940

Hello,

On my Bq76940 I added Q1 and Q3 optional power fets because I wished to pass more current. However, both Q1 and Q2 get extremely hot during both charging and discharging while Q2 and Q4 dont show any noticeable heating. I replaced each fet once but it is still happening. Is there any reason that this would happen to Q1 and Q2 and not Q3 and Q4? 

-Kyle