Two Battery Issue

[chris at idlelion.net]

I have a ThinkPad T60 and I swapped out the optical drive for an extra 
battery. The main battery is a 9-cell Li-Ion, and the bay battery is a 
3-cell equivalent Li-Polymer.

I'm running FC6 and Gnome desktop. The gnome-power-manager seems to 
display the total charge correctly, in that it knows that when the bay 
battery reaches 0% (or maybe 1% sometimes) that the total charge is still 
at 75 or 80%.

The ThinkPad uses the bay battery first, and when that gets drained, the 
machine suspends immediately with no notice or chance to stop. While it's 
not catastrophic, it is a bit annoying.

Is there any configuration I can tweak to avoid the suspend, or should I 
file a bug report?

Thanks,
Chris