OK, so the team needs to check on something. Could you try the following: Uninstall NMU Switch battery to one of the non 1500 mAH batteries (either the 1650 or 1800 will work) Reboot at least once Reinstall NMU Check to see what NMU is showing for the battery now.
This will help confirm or dissprove the teams suspicions.
Thanks for bringing this up... Sure this is being worked on but thought id post that i have the same issue on my system. I also did initially disable low battery warning and then restored it to warn at 30% but wasn't aware if this was what caused the issue. NMU is showing 1650mAh greyed out and cannot be adjusted.
System details as follows:
Samsung Galaxy Note N7000 Stock Android 2.3.6 / Stock UK KKA kernel NMU 188.8.131.52 full license Stock Samsung 2500mAh battery