I am going on a bicycle tour and would like to use the 770 with Maemo Mapper as a tracking GPS for the trip. There will probably be little access to charging outlets during the trip. I have found that Inovus sells a solar powered charging bag which they claim will trickle charge cell and pda batteries. Does anybody have any experience with this or other solar chargers to maintain or charge the internet tablets? The Inovus product can be found at http://www.eclipsesolargear.com/prod...9&idproduct=16