1) BT308
2) Not sure, never ran it dry (it obviously lasts through shorter trips close by when you're not sure where you're going, and for longer roadtrips I always run it off the cig lighter)
3) A year or so, probably used it a total of .. 30 hours? between various roadtrips, etc. heh, kinda sad I've used it about 1 day out of the last 365 and it's sat in my glovebox the rest of the year
4) I sure can, and will if there's interest in it.. but it's exactly like any pic you'll find online of the unit (example:
http://www.pocketgpsworld.com/globalsat-bt308.php), in int shap, etc.
5) I might, let me research it a bit.
-arebelspy