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If the GPS is mostly off (i.e. you're only rarely using your GPS app), I think you will get ~2 days of battery life. To get that much battery life, you'd need to do these things: Keep the GPS off as much as possible (i.e. use it no more that 5-6 times a day) Turn it off at night completely keep brightness to a minimum Disable all cellular antennas (may ...

Presuming you do not have Amateur Radio licenses, or similar qualifications, you are then limited to various unlicensed options. The answer will then vary by region, but as you mention Canada, your best bet will be to use the GMRS/FRS (General Mobile Radio Service / Family Radio Service) which as basically replaced the old CB and walkie-talkie bands for ...

My solution is to let the phone be a phone (and GPS and web browser and ...) and take a camera to be a camera. My camera uses AA batteries, it's simple enough to bring spares, and I have a solar recharger for them too. I can take hundreds of pictures before I need to recharge the batteries. I can turn the phone on once a day or so to use the GPS or whatever, ...

Battery consumption is determined by the software, too. Some stuff polls for new data, some takes GPS readings more often then others, etc. Honestly, I do not consider using a smartphone app for hiking or getting out into the backcountry. For too many of them you need network connectivity, battery life is a real issue (compared to dedicated GPS ...

You could consider looking into something like the PowerPot. They are currently accepting pre-orders on Kickstarter. It is described as follows: Simply put, the PowerPot transforms the heat from cooking into electricity (…) using a technology called thermoelectric power generation. I’m not sure how well it will work, but from their description ...

As Rory says, low power consumption is vital, but that's likely not determined by the software, but rather by the hardware and - more importantly - how you use it. The three key things for me in Smartphone GPS map systems are these. Can download maps to the device, rather than stream. (And I wouldn't trust anything claiming to just 'cache' streamed maps, ...

Take an external rechargeable powerpack like one of these:- http://www.amazon.com/PowerGen-External-Blackberry-Sensation-Thunderbolt/dp/B005VBNYDS/ref=dp_cp_ob_hpc_title_1 Choose the size of powerpack according to your trip length and needs, as these things are not lightweight. Obviously, these tend to be bigger and heavier than the device you're looking ...