I would like to buy some new Nokia phone. Now I have N70. I prefer some with better resolution and mainly with long holding time. When I use bluetooth GPS receiver the battery hold cca 7-8 hours (maximum), but it is when i use SmartcomGPS. I know, that racechrono is much exacting. So can you give mi advice please which phone will be able function at least 3-4 hours with RaceChrono? I donÂ´t use it on car but on locomotive (railway) so staying power only 1 hour is not so useful for my purpose. Thank you for help!