I looked into the registry & started playing with the following keys & values. The values are Decimal, NOT HEXIDECIMAL!
"BattSuspendTimeout" seems to be the cuplrit that matches up with "On battery power". I did get the device to Auto-off in about 90 secs using settings. WHY 90????? Well it also looks like the "BattResumingSuspendTimeout (15)" is tacking time on. I could be totally wrong!
So I'm hoping someone with more knowledge will chime in here.
Nonetheless, it turns off now. EXPERTS, let us here from ya!
HKLM/System/CurrentControlSet/Control/Power
BattPowerOff (60)
DisableGwesPowerOff (1)
ExtPowerOff (0)
SystemPriority256 (24
WakePowerOff (60)
HKLM/System/CurrentControlSet/Control/Power/Timeouts
ACResumingSuspendTimeout (15)
ACSuspendTimeout (0)
ACUserIdle (0)
Battery Poll (5000)
BattResumingSuspendTimeout (15)
BattSuspendTimeout (60)
BattUserIdle (0)