[DoctorWkt]

The battery life on both devices did not seem to be worse than usual. Mind you, I only did a few hours of walking. It looks like the T68 would go for about 8 or more hours without running out of battery. Next time I go out for several hours, I'll log the battery percentage before and after.

Edit: I'm running Battery Monitor Widget and it keeps a log of battery percentages. On a 3h 45m kayak trip the battery dropped from 77% to 50%, which is 27%. If it scales linearly, this would be over 13 hours to lose 100% of the battery. Mind you, this was with 1 second GPS updates which cause the screen to refresh every second. I'll try 2 second updates next time.

Edit #2: We went kayaking for four hours today. This time I kept the T68 on the ADW launcher screen as much as possible so that there were few screen updates; I only checked the maps on OruxMaps as required. I saw a 6% battery drop per hour. WiFi was off, Bluetooth on, front light off, and the CPU was ondemand.