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Q&A How can I keep my iPhone going on a multiday hike?

Taking a five day hike, and I want to take a bazillion pictures. It would be nice to have the compass & GPS functionality too, and I want something really small. The obvious choice is my iPh...

9 answers  ·  posted 12y ago by Affable Geek‭  ·  last activity 5y ago by System‭

Question electronic-gear
#2: Attribution notice added by user avatar System‭ · 2020-04-17T21:22:49Z (over 4 years ago)
Source: https://outdoors.stackexchange.com/q/1260
License name: CC BY-SA 3.0
License URL: https://creativecommons.org/licenses/by-sa/3.0/
#1: Initial revision by user avatar Affable Geek‭ · 2020-04-17T21:22:49Z (over 4 years ago)
<p>Taking a five day hike, and I want to take a bazillion pictures.  It would be nice to have the  compass &amp; GPS functionality too, and I want something really small.  The obvious choice is my iPhone.</p>

<p>As everyone knows, however, an iPhone sucks juice like a baby waking up from a night's sleep. Even if I turn off all the radio transmitters, I just can't imagine my iPhone holding a charge for more than a day.</p>

<p>I've poked around looking at hand-crank chargers (not recommended for smart phones), and solar panels seem to have really mixed results.  I've also seen chargers that take 9-volt batteries and convert them into juice, but realistically don't know how many batteries I'd need to drain to keep my electronics going.</p>

<p>So, what is my best option for having this device last the whole hike, with no recharge?</p>