my dear fellow N900ers,

i'm about to embark on a long trail walk (30+ hours) in a couple of weeks and i'd like to record it with either eCoach or GPS Recorder on my N900. as many of you might have guessed already, my only concern is power consumption. i have two batteries (the Nokia BL-5J) at my disposal. and i will re-flash my device and install only those two apps, or only one of them, if i could find out which one of eCoach and GPS Recorder is better than the other. basically, i'll be using my N900 as a GPS device only. i'm using another phone for calls.

i've already taken all necessary means to save power (e.g. setting the brightness to lowest, turning off time update, using a black background on my desktop without any shortcut or widget). and i know i can "tracker-processes -t" to stop trackerd. is there anything else i can stop?

i think i will also explore QCPUFreq to limit the maximum CPU frequency and/or to use SmartReflex. does anyone have any experience on this (e.g. lowest sustainable maximum frequency)?