Hardware Reference
In-Depth Information
GPS is active, as shown by the location icon left of the Wi-Fi icon on the status bar at the
top right corner of the screen
Navigation
Using your Android device to navigate by street or in the backcountry is by far the largest
drain on your battery. The screen stays on by default and so does the GPS receiver. If you
plan to use your device for extensive street navigation in a vehicle, you should power the
tablet from the vehicle with a car charger. See Chargers .
In the backcountry, you can greatly extend battery life by leaving your phone or tablet off
except when you need to check your location and progress. By doing this you can extend
the battery life to days rather than hours. In the case of a phone this also preserves your bat-
tery for emergency calls. Don't forget to download maps to your phone or tablet at home so
you'll have access to them when you're out of Wi-Fi or LTE range. See Topographic Maps
for an example.
Another option for extended backcountry trips is a solar charger- see Chargers .
Video
Watching movies and TV shows is power-intensive because the display has to be on con-
tinuously and streaming video uses a lot of data, which makes the Wi-Fi or LTE radio in
the device work harder. You can extend battery life while watching videos by keeping the
display set to adaptive brightness as described above in Display .
Audio
Audio only uses a lot of power if you use your device to drive external wired unpowered
speakers or leave the display on, but there's little need to do either. Powered speakers and
Bluetooth speakers have their own batteries or AC adapters and don't drain devices much
faster than wired earbuds.
Remove Unneeded Apps and Widgets
You should always remove apps that you no longer use. They not only take up storage space
on your phone or tablet, they use processor and battery power, especially if left running in
the background. To remove an app, find it in the Apps Drawer, then long-press it and drag
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