Mapfactor Navigator for me used on my Cloudfone Thrill 430x with it's huge 4160mAh battery
2 hours of continuous usage usually just consumes around 10% - 15% of battery life

Just download the Philippines map and your good to go, no internet connection needed. Has turn by turn spoken directions and route calculation happens really fast. It has a nice 3D mode with lots of POI (not as much as OSM though) and it shows the speed limits on a certain stretch of road.
Only gripe is it doesn't use the phone's compass to point where you are headed but uses the direction of your motion instead. So when your are in a complete stop, the arrow pointing to a single direction turns into an arrow pointing into 4 directions