BQ20Z70-V150: Power consumption in Shutdown mode while leaving the FETs on

I have a device at prototype stage, which has a bq20z70-based battery pack. I want to shut the device down for shipping & storage purposes, and so battery discharge rate is important.

Shutdown mode on this chip seems to fully mean what it says "on the box": the battery gets disconnected such that Vcc is off, but the chip doesn't communicate. 

This is a problem as it sometimes won't power the device on power up after a period of storage when the mains charger is disconnected.

I'm experimenting with shutting it down, but leaving the CHG & DSG FET on - is that the correct way to handle this corner case?

And how much current does the bq20z70 take in that configuration? The rest of my device / system is switched off, so if I understand the current paths through the FETs, the battery life will be determined purely by the current taken by the  bq20z70.

Thanks for  any replies that I might get!

Ken