Charge threshold w/ utrabay battery and Windows 8

Hello
One more problem with the missing Power Manager under Windows 8.
The battery charge threshold can be changed in the registry or using the freeware utility in http://thinkutils.wordpress.com/collection/power-m​anager/
Does anybody know how I can set the charge threshold when using a second battery in my T430s' ultrabay?
I have tried many things with the registry, nothing worked reliably. At the end nothing worked any more and I had to use a restore point...
It would be good if Lenovo would hear to their customers an bring us back the Power Manager functionality!
Regards
Patrick

Hey, nobody else has an ultrabay battery and would like to optimize its charge?
After having had almost no problems with my T410s and Windows 7, now I'm beginning to bitterly regret having updated to a T430s with Win 8. Much heavier machine, unreliable WLAN (after the last Lenovo update, it didn't work any more at all...), unreliable BlueTooth, no more Power Manager and so on. Is that what Lenovo and Microsoft understand under "technical improvements"?
Regards
Patrick

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