31

I did use my phone as a mapping device a few times when I forgot my dedicated GNSS receiver at home (for peakbagging day-trips where I need to reach a specific point often under forest canopy and without easily identifiable landmarks). The battery doesn't drain exceedingly fast but the more I look at the screen and interact with it, the faster it drains. It ...


12

Consider buying a power bank with a solar charging panel; that lets you recover from an accident like leaving your phone on overnight with something consuming power. There are two main types on the market: Big panels you unfold and hang up at your campsite or on the back of your pack while walking. (I've never used these.) Standard batteries with a small ...


11

It all depends on how (and how much) you use those devices. Personally, I can say more about DSLRs than phones, and with 2 different DSLRs on 5 tours (of 2-3 weeks) there was never an identical usage so far. The "official" number of photos you can take with one battery can be exceeded by limiting every usage outside of taking the photos - those are included ...


11

How much margin due to charging inefficiency should I add when calculating the size of batteries needed for a trip? You need approximately 50% more due to inefficiencies while charging from a power bank. How much energy you really need will depend a lot on the actual usage, so you'll have to make some experiments. Put your fully charged phone in airplane ...


10

I don't know what phone you have, but there appears to be a relatively simple Android app called "GPS Coordinates GPS Location" that claims to be able to text your coordinates without requiring a data connection. Edit: The app has over 100,000 downloads with people claiming it does exactly what it states.


9

In addition to the good advice Tullochgorum gave, I have been Geocaching for a couple years, i did it for about a year with just my phone, later i bought a dedicated GPS device, used it for awhile and then went back to my phone. With the correct app a phone is just fine. I find mine to be accurate to about 10 feet, with the given hints and whatnot in the ...


5

Modern smartphones are at least as accurate as dedicated GPS devices in most conditions. Just turn off battery intensive apps to preserve battery life if you will be out for an extended period. But Google Maps is not the way to go outside of urban walking - you will generally need a specialised GPS app with downloadable maps that can be used offline when ...


5

It depends on how many pictures you want to take and how much weight you want to carry. In your case it looks like two camera batteries is enough for 1600 pictures, that may or may not be enough for your purposes. As far as your phone goes keeping it only in airplane mode, using the the low power setting and only turning it on when needed means that usage ...


4

A couple of points that I think haven't been addressed: Charging efficiency is greatest when you are charging between around 20/30% and 80%. So try to not let it get below 20% and try to stop when it's at about 80%. This will help you charge more from the same charger. You probably can't do this with the camera batteries, but you can with the phone ...


4

There are lots of apps that will share and mark your position with a pin on a map. For my day job I'm part of a team that is in charge of the Connected Living iPhone app. We offer that functionality among other things. The app that we view as our biggest competition is called Life360. They also offer that functionality among other things. Another app that ...


4

I believe what you are looking for can be found here, Cellular Coverage in National Parks which has cell phone coverage maps for a number of National Parks in the US. It depends on the park and has no percentages, but its probably the best one can get. I will note that based on my experience in RMNP, there are more areas with coverage than shown. It does ...


3

If you want to find everything, you'll probably need a good GPS. But it's entirely possible to work without any device at all. I started geocaching only this year, and have found almost every cache that I've looked for. I decided that snow, a very cold winter, and COVID-19 lockdowns aren't enough, so I gave myself the additional handicaps of walking, not ...


2

This is a bit of a non-answer but is probably better than a string of comments. There are some ideas in here. The problem is that you need line of sight rather than to be near a tower. You could work that out from a contour map with the towers marked - get electronically or on paper. But tower locations aren't generally published, at least not in a ...


2

Considering I will always have my phone turned on while hiking There's a lot of variability in this, even given that you've specified airplane mode. Why is it on? Track logging with the screen off? This won't use much power, but you could still get through a charge in a couple of days on many phones. If you lose your track logging you're still safe. ...


2

Although this has been mentioned in some comments, it needs to be stressed more strongly: Do not rely exclusively on electronics for navigation, in particular not on a smartphone! You must always bring a paper map¹. You must always know where you are on that map. I recommend to hang a good map case around your neck, so you can monitor your progress on ...


2

I have no certainty in this answer, so it may be inaccurate. The idea behind FirstNet is that it allows priority for emergency services in times of emergency. In several (relatively) recent disasters such as the attacks on 911 and during hurricane Katrina, regular phone services were overwhelmed by emergency and non-emergency calls, so a dedicated priority ...


1

I run into similar problems on canoe trips. My camera is a through-the-lens viewfinder, not an electric screen. Doing an entire canoe trip (3 weeks) and taking ~500 frames is easy. In addition, for the Nikon you can get a cute carrier that allows you to use 3 CR123 lithium batteries instead of the rechargeable one. A set of the disposable lithium are ...


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