Have been using Androzic navigator for Android for the past four months or so for SOTA mountain navigation. Offline maps can be created from online maps such as Open Cycle Map using the Ozimapper app.
Androzic runs on a Google Nexus 7 tablet for in car navigation and a Samsung I9210 4G phone for on foot. I did have an I9100 3G phone earlier, but something happened to that. 😦
Its a nice application but have noticed a heavy drain on the battery when navigating, so thought I would have a look at the drain in detail. Don’t want to get “battery anxiety” when out in the bush. Of course always have a compass and a paper map on hand.
When Androzic is tracking (turned on by the icon that looks like an upside down “drip”, the battery drain increases markedly. Using Battery Monitor Widget for Android, I did some rough measurements.
– Androzic running
– Wifi on
– GPS on
– Minimal screen use, say 60 seconds per hour.
– Androzic tracking on and then tracking off see below captions:
When tracking is on, it looks like the phone will last about 7 hours at a pinch and less depending on the time the screen is turned on. If it uses ~12%/hr that would equate to 8 hours with no margin.
Not wanting to suffer battery anxiety, its better to keep way under 8 hrs!
With tracking off, the drain is far less and this is the mode that I generally use Androzic during SOTA. When taking a position, tracking is turned ofn, the location noted and tracking turned off unless there is a track to record. If there is a track to record, keep an eye on battery capacity.
I might do an equivalent test with say, Viewranger to see how it’s power consumption is during tracking.
OK, had time to check Viewranger, with tracking on it uses about 8% battery per hour. Current is about 120mA, which is better than Androzic.
Update 2013-04-24: Androzic has released a software update and one of the fixes is supposed to improve battery drain. Looks like it needs to be checked again!
After a 3 hour test with Androzic V1.7.5 it has improved a little over the previous version. The average drain was about 9% per hour and average current around 150mA. This is with the screen off for test period and a couple of 5 second screens ons.