bq27520-G4 / Powering REGIN from VSYS of charger

Hi,

My customer plan to connect REGIN to VSYS of charger IC (bq2589x) as attached. The purpose of this configration is to reduce load from battery at ship mode of bq2589x because bq2589x can disable VSYS at ship mode. Then please give your comment for following question.

1. Can you recommend this configuration? Please let me know if you can find undesirable situation.
2. Is there no issue to apply battery voltage to only BAT pin at bq2589x ship mode?

Best Regards,
Sonoki