crabolsky just type battery-status in xterm...not root
and this puts a file out...change the 10 to whatever...for logging the consumption outputs a log file...

battery-status -d 10 > /media/mmc1/battery.log &
heres the output
----------------------
[Jun 22 21:20][00:00] 78.4%
[Jun 22 21:30][00:10] 78.4%
[Jun 22 21:40][00:20] 78.4%
[Jun 22 21:50][00:30] 78.0%
[Jun 22 22:00][00:40] 78.0%
[Jun 22 22:10][00:50] 77.6%
[Jun 22 22:20][01:00] 77.6%
[Jun 22 22:30][01:10] 77.6%
[Jun 22 22:40][01:20] 77.6%
[Jun 22 22:50][01:30] 77.6%
[Jun 22 23:00][01:40] 77.2%
[Jun 22 23:10][01:50] 77.2%
[Jun 22 23:20] Charging
[Jun 22 23:30] Charging
[Jun 22 23:40] Charging
[Jun 22 23:50] Charging
[Jun 23 00:00] Charging
[Jun 23 00:10] Charging
[Jun 23 00:20] Charging
[Jun 23 00:30] Charging
[Jun 23 00:40] Charging
[Jun 23 00:50] Charging
[Jun 23 01:00] Charging
[Jun 23 01:10] Charging
[Jun 23 01:20] Charging
[Jun 23 01:30] Charging
[Jun 23 01:40] Charging
[Jun 23 01:50] Charging
[Jun 23 02:00] Charging
[Jun 23 02:10] Charging
[Jun 23 02:20] Charging
[Jun 23 02:30] Charging
[Jun 23 02:40] Charging
[Jun 23 02:50] Charging
[Jun 23 03:00] Charging
[Jun 23 03:10] Charging
[Jun 23 03:20] Charging
[Jun 23 03:30] Charging
[Jun 23 03:40] Charging
[Jun 23 03:50] Charging
[Jun 23 04:00] Charging
[Jun 23 04:10] Charging
[Jun 23 04:20] Charging
[Jun 23 04:30] Charging
[Jun 23 04:40] Charging
[Jun 23 04:50] Charging
[Jun 23 05:00] Charging
[Jun 23 05:10] Charging
[Jun 23 05:20] Charging
[Jun 23 05:30] Charging
[Jun 23 05:40] Charging
[Jun 23 05:50][08:30] 97.2%
[Jun 23 06:00][08:40] 97.2%
[Jun 23 06:10][08:50] 96.8%
[Jun 23 06:20][09:00] 96.8%
[Jun 23 06:30][09:10] 96.8%
[Jun 23 06:40][09:20] 96.8%
[Jun 23 06:50][09:30] 96.8%
[Jun 23 07:00][09:40] 96.8%
[Jun 23 07:10][09:50] 96.8%
[Jun 23 07:20][10:00] 96.8%
[Jun 23 07:30][10:10] 96.8%
[Jun 23 07:40][10:20] 96.8%
[Jun 23 07:50][10:30] 96.8%
[Jun 23 08:00][10:40] 96.8%
[Jun 23 08:10][10:50] 96.8%
[Jun 23 08:20][11:00] 96.8%
[Jun 23 08:30][11:10] 96.8%
[Jun 23 08:40][11:20] 96.8%
[Jun 23 08:50][11:30] 96.8%
[Jun 23 09:00][11:40] 96.8%
[Jun 23 09:10][11:50] 96.8%
[Jun 23 09:20][12:00] 96.8%
[Jun 23 09:30][12:10] 96.8%
[Jun 23 09:40][12:20] 96.8%
[Jun 23 09:50][12:30] 96.8%
.8%
[Jun 23 09:54][12:40] 96.8%