I ran an interesting experiment yesterday.
I haven't installed the battery script yet, but here's what I did:
- Charged my battery to the max, 1260 mAH reported
-Drained it, by setting kernel limits to 1150 1150, and decompressing a 14GB archive
- That left me with about 22% charge, 275 mAH reported
- Browsed heavy flash websites, viewed a couple of vids on youtube, and played a flash game on FB
- That left me with 5% charge left, my aim
- echoed 10 for vfs cache pressure
- Set kernel limits at 250 1000 (the way I always do)
- Left the phone standby

Results:
14:45 hrs. have passed by, device still alive, no low battery beeps, can't know what charge is left because I bet it would reboot if I just went to the desktop...